enhance pathconf constants to cover the most common constants

Add missing consts for Solaris/Illumos

linux: /usr/include/bits/confname.h (taken from redhat, checked against https://github.com/cpc26/abi_linux/blob/master/linux-abi/branches/IBCS3/cxenix/pathconf.c)
android: https://android.googlesource.com/platform/development/+/android-4.3_r1.1/ndk/platforms/android-3/include/pathconf.h
mac: taken from /usr/include/sys/unistd.h

Bump to 0.2.13

unix: Add lchown

Add SEEK_DATA/SEEK_HOLE constants

Relates to https://github.com/nix-rust/nix/pull/377.  These constants
are only available in systems running the Linux kernel.

Relates to https://github.com/nix-rust/nix/pull/377

.  These constants
are only available in systems running the Linux kernel and are not
defined in musl libc (yet).

Signed-off-by: Paul Osborne <osbpau@gmail.com>

Add missing constants for wait family

Fixes #315

Use docker for all CI tests and images

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.

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...