* Add syscall tables to most remaining arches in `src/unix/notbsd`
* Add aarch64/arm musl to CI
* Update dependencies

Local peer credential support for FreeBSD.

FreeBSD uses SOL_SOCKET/LOCAL_PEERCRED instead of SOL_SOCKET/SO_PEERCRED parameters to getsocktopt to retrieve the credentials of a socket's peer.

(Documented in man 4 unix)

Add missing powerpc64 in musl/mod.rs

powerpc64 was missing in musl/mod.rs and making build fail
as it was not able to find types, like c_char.

powerpc64 was missing in musl/mod.rs and making build fail
as it was not able to find types, like c_char.

Local peer credential support for Darwin.

Darwin uses SOL_LOCAL/LOCAL_PEERCRED instead of SOL_SOCKET/SO_PEERCRED parameters to getsocktopt to retrieve the credentials of a socket's peer.

(Documented in man 4 unix)

define SYS_renameat2 + flags on linux

Motivation: there is no glibc wrapper for this syscall

Motivation: there is no glibc wrapper for this syscall

Add getprotobynumber

Add `project_name` attribute to appveyor badge.

There was a recent [issue](https://github.com/rust-lang/crates.io/issues/587) in crates.io where appveyor is looking for a dash separated URL for the link to appveyors site:
```
https://ci.appveyor.com/project/rust-lang-libs/libc
```
 and the actual repo name for the image badge url:
```
https://ci.appveyor.com/api/projects/status/github/rust-lang/libc?svg=true
```
We recently added the ability to specify a `project_name` that fixes this issue.  You'll notice that currently on https://crates.io/crates/libc the appveyor badge on the right sidebar show `build unknown`, this PR will address that issue.

Please let me know if you have any questions.

Add `ucred` to musl

Fix glibc 2.26 incompatibilities #788

Hopefully the `xlocale.h` → `locale.h` change won't break something else somewhere...

Add `ucred` on Android

netbsd: add KERN_PROC_ARGS sysctl MIB subtypes

Add getservbyname, getprotobyname, and related structs

bump to 0.2.32

- add DCCP constant definitions
- add clock_gettime related functions to macOS
- add fstatat64 on linux/android
- add preadv64/pwritev64 on linux/android
- add utimensat on solaris, netbsd and openbsd
- add IP_BINDANY on freebsd

- add DCCP constant definitions
- add clock_gettime related functions to macOS
- add fstatat64 on linux/android
- add preadv64/pwritev64 on linux/android
- add utimensat on solaris, netbsd and openbsd
- add IP_BINDANY on freebsd

Add IP_BINDANY for FreeBSD

Adds the IP_BINDANY constant for FreeBSD. Thanks!

add utimensat to NetBSD and OpenBSD

Disable https on Android SDK fetch

Apparently it no longer works

Apparently it no longer works

Add preadv64/pwritev64 on Linux/Android

Add fstatat64 on Linux/Android

Add support for aarch64-unknown-linux-musl

This adds support for aarch64-unknown-linux-musl as requested in rust-lang/rust#44779 by @alexcrichton

The new file `ci/docker/aarch64-unknown-linux-musl/Dockerfile` essentially merges the aarch64-unknown-linux-gnu and x86_64-unknown-linux-musl Dockerfiles.

The bigger changes are under `src/unix/notbsd/linux/`, though they're fairly superficial:

Previously, some constants could be shared between all 64-bit musl triples, but aarch64 differs, so a number of things were moved from `musl/b64/mod.rs` to specific arches: `musl/b64/powerpc64.rs` and `musl/b64/x86_64.rs`, with the aarch64-specific differences being added to `musl/b64/aarch64.rs`.

Similarly, some constants moved from `musl/mod.rs` to lower levels: `musl/b32/mod.rs`, `musl/b64/powerpc64.rs`, and `musl/b64/x86_64.rs`, with the aarch64-specific differences added to `musl/b64/aarch64.rs`.

Finally, some things that were true of all Linux builds moved from `mod.rs` into lower levels: `mips/mod.rs`, `other/mod.rs`, `musl/b32/mod.rs`, `musl/b64/powerpc64.rs`, and `musl/b64/x86_64.rs`, with the aarch64-specific differences added to `musl/b64/aarch64.rs`.

Testing:

All linux-based triples under `ci/docker` were run through `ci/run-docker.sh` successfully, which checks that the size and alignment of definitions match for each triple, among other tests.  (The local build of rust from rust-lang/rust#44779 was set for the aarch64-unknown-linux-musl build.)

I also confirmed that it has "good style!" according to `ci/style.rs`.

Signed-off-by: Tom Kirchner <tjk@amazon.com>
Signed-off-by: Ben Cressey <bcressey@amazon.com>

Haiku fixes for nix