Previously we were somewhat half-Docker, half-Travis, half apt-get, etc. This
commit alters the CI infrastructure to use Docker images for each target. This
should make it much easier to update the images and tweak various bits and
pieces of installed software. Additionally, it's also much clearer now what's
needed for each suite of tests!

Some images were updated a bit (e.g. musl is now 1.1.14), but other images
encountered failures when updating so they're not getting updated just yet.

Bump to 0.2.12

Add Directory file descriptor relative syscall.

Add Directory file descriptor relative syscall.

I only added "*at" syscall relative to Posix2008 specification.

At the moment OSX and Android are partially supporting this API.

This include:
* `openat`
* `faccessat`
* `fchmodat`
* `fchownat`
* `fstatat`
* `linkat`
* `mkdirat`
* `mknodat` [0]
* `readlinkat`
* `renameat`
* `symlinkat`
* `unlinkat`
* `mkfifoat` [0][1]

[1] Not available on Android at the moment:
* `mkfifo`

[1] Not available on OSX at the moment:
* `mkfifoat`
* `mknodat`

And exclude operating system specific API:
* `renameat2`: Linux specific
* `execveat`: Linux specific since 3.19
* `futimesat`: GNU extension
* `name_to_handle_at`: GNU extension
* `scandirat`: GNU extension
* `fanotify_mark`: belong to fanotify API.

Fix semaphores on Solaris/Illumos

This adds `sem_t` structure introduced in https://github.com/rust-lang/libc/pull/309 and fixes compilation on Solaris.

I only added "*at" syscall relative to Posix2008 specification.

At the moment OSX and Android are partially supporting this API.

This include:
* `openat`
* `faccessat`
* `fchmodat`
* `fchownat`
* `fstatat`
* `linkat`
* `mkdirat`
* `mknodat` [0]
* `readlinkat`
* `renameat`
* `symlinkat`
* `unlinkat`
* `mkfifoat` [0][1]

[1] Not available on Android at the moment:
* `mkfifo`

[1] Not available on OSX at the moment:
* `mkfifoat`
* `mknodat`

And exclude operating system specific API:
* `renameat2`: Linux specific
* `execveat`: Linux specific since 3.19
* `futimesat`: GNU extension
* `name_to_handle_at`: GNU extension
* `scandirat`: GNU extension
* `fanotify_mark`: belong to fanotify API.

Add more constants from sys/wait.h

And fix WIFEXITED on Linux, which seemed to be wrong.

And fix WIFEXITED on Linux, which seemed to be wrong.

Add semaphore APIs

Adding sched_getcpu() for Android and Linux

None

Fix ioctl types for non-x86 musl

This fixes up #289 by changing the type for other platforms as well.

added const SOCK_SEQPACKET,  and SOCK_RDM where applicable

... which is used for UNIX Seqpacket sockets as well as SCTP IP.

I have verified in source on  a couple Linux flavours as well as freebsd and darwin source that SOCK_SEQPACKET has value 5.
Solaris is the odd one with a value of 6.  I also added RDM for solaris (value 5)

Added nice, setpriority and getpriority along with constants and type…

… definitions

Adding sysinfo() and sysinfo struct for Linux and Android.

Sadly, the sysinfo struct varies slightly between Musl and Glibc / Bionic.

This means that users need to be careful when using the uptime, and should
always cast it to a signed value. Why uptime can be signed is beyond me...

Add pthread mutex type constants

These are needed to create a pthread mutex that doesn't use lock elision on glibc.

linux: Support getting and setting the cpu affinity for the current pthread.

This implements `pthread_getaffinity_np` and `pthread_setaffinity_np` for linux.

pthread.

Sadly, the sysinfo struct varies slightly between Musl and Glibc / Bionic.

This means that users need to be careful when using the uptime, and should
always cast it to a signed value. Why uptime can be signed is beyond me...

Add the TIOCGWINSZ and TIOCSWINSZ constants

I've added the `TIOCGWINSZ` and `TIOCSWINSZ` constants/ioctl control codes. I wasn't quite sure where to put them, so hopefully they're in the right place.

As of now it's set to compile on 'FreeBSD-like' platforms, so it will compile on both FreeBSD *and* DragonflyBSD. I've only tested it on FreeBSD though, but it should also work on DragonflyBSD AFAIK.

Fixes #292.

Fix ioctl constants for musl target envs.

Heya!

I ran across this issue today while trying to build a portable static binary using the `x86_64-unknown-linux-musl` target. Took a bit of digging to make sure I understood what was going on, and while I may still be off the mark, I believe this is a fix to my issue.

Thanks!!

----

According to musl's source, the `ioctl` [function signature][musl-ioctl-h] takes an `int` as the request argument (i.e. an `i32`) which is reflected in this crate's [ioctl binding][musl-ioctl-rs]. It looks like when the ioctl constants were added that [glibc's default][glibc-ioctl-h] of a `c_ulong` type was used for the musl values as well, rather than a `c_int` type. This change updates these constants to a `c_int` so that they match the expected function call type.

Here is a minimal reproduction of the issue. Given this Rust program:

```rust
extern crate libc;

use libc::{ioctl, winsize, STDOUT_FILENO, TIOCGWINSZ};

fn main() {
    let mut wsize = winsize {
        ws_row: 0,
        ws_col: 0,
        ws_xpixel: 0,
        ws_ypixel: 0,
    };
    unsafe {
        ioctl(STDOUT_FILENO, TIOCGWINSZ, &mut wsize);
    }
    println!("Sizes: {{ rows: {}, cols: {}, xpixel: {}, ypixel: {} }}",
             wsize.ws_row,
             wsize.ws_col,
             wsize.ws_xpixel,
             wsize.ws_ypixel);
}
```

When run against the `x86_64-unknwon-linux-gnu` and
`x86_64-unknown-linux-musl` targets, we see the difference in behavior:

```
> cargo clean

> cargo run --target=x86_64-unknown-linux-gnu
   Compiling libc v0.2.11
   Compiling libc-musl-ioctl v0.1.0 (file:///src/libc-musl-ioctl)
     Running `target/x86_64-unknown-linux-gnu/debug/libc-musl-ioctl`
Sizes: { rows: 28, cols: 211, xpixel: 0, ypixel: 0 }

> cargo clean

> cargo run --target=x86_64-unknown-linux-musl
   Compiling libc v0.2.11
   Compiling libc-musl-ioctl v0.1.0 (file:///src/libc-musl-ioctl)
src/main.rs:13:30: 13:40 error: mismatched types:
 expected `i32`,
    found `u64` [E0308]
src/main.rs:13         ioctl(STDOUT_FILENO, TIOCGWINSZ, &mut wsize);
                                            ^~~~~~~~~~
src/main.rs:13:30: 13:40 help: run `rustc --explain E0308` to see a detailed explanation
error: aborting due to previous error
Could not compile `libc-musl-ioctl`.

To learn more, run the command again with --verbose.
```

Working against this fix:

```
> cargo clean

> cargo run --target=x86_64-unknown-linux-gnu
    Updating git repository `https://github.com/fnichol/rust-lang-libc.git`
   Compiling libc v0.2.11 (https://github.com/fnichol/rust-lang-libc.git?branch=fix-musl-ioctl-constants#3285f387)
   Compiling libc-musl-ioctl v0.1.0 (file:///src/libc-musl-ioctl)
     Running `target/x86_64-unknown-linux-gnu/debug/libc-musl-ioctl`
Sizes: { rows: 28, cols: 211, xpixel: 0, ypixel: 0 }

> cargo clean

> cargo run --target=x86_64-unknown-linux-musl
   Compiling libc v0.2.11 (https://github.com/fnichol/rust-lang-libc.git?branch=fix-musl-ioctl-constants#3285f387)
   Compiling libc-musl-ioctl v0.1.0 (file:///src/libc-musl-ioctl)
     Running `target/x86_64-unknown-linux-musl/debug/libc-musl-ioctl`
Sizes: { rows: 28, cols: 211, xpixel: 0, ypixel: 0 }
```

[musl-ioctl-rs]:
https://doc.rust-lang.org/libc/x86_64-unknown-linux-musl/libc/fn.ioctl.html

[musl-ioctl-h]:
https://git.musl-libc.org/cgit/musl/tree/include/sys/ioctl.h

[glibc-ioctl-h]:
http://bazaar.launchpad.net/~vcs-imports/glibc/master/view/head:/include/sys/ioctl.h

Add back HW_NCPU

Removed by accident in #285