Bump to 0.2.33

Just bumping the release to make getprotobyname, getprotobynumber and getservbyname available.

Fixes and test for x86_64-unknown-linux-gnux32

This fixes all libc tests and almost all rustc tests (3 libstd tests and one run-pass test fails).

Fixes https://github.com/rust-lang/libc/issues/816https://github.com/rust-lang/libc/issues/816

Add sparc64-unknown-linux-gnu to CI (with disabled tests)

Tests are disabled because qemu segfaults, see https://github.com/rust-lang/libc/issues/822

The builder is still useful to catch some errors.

Add mips64el to CI

Add powerpc64le to CI

Fix android ci

Fix kqueue filter consts type on NetBSD [WAS: Provide EV_SET]

Using BSD kqueue's `kevent` structure is tedious, because some BSD variants define the structure slightly differently. This forces user's code to differentiate between BSD variants and initialize `kevent` accordingly, which is annoying and error-prone.

For an example, refer to [MIO](https://github.com/carllerche/mio/blob/master/src/sys/unix/kqueue.rs#L38).

This is an attempt to fix it - provide a ctor function with the same signature across BSD variants.

Is an `impl` piece for a C structure allowed in libc?

**edit:** I noticed the `kevent` function has a similar problem, maybe I should include a fix for that too...
**edit:** ^ Done

fix ABI breakage in syscall constants

Fix other platforms impacted by 9029cfb9

Initial fixes for linux x32

Tested with a local build of rustc. The main test can be compiled but fails to execute (receives SIGTRAP, which I think in this case indicates memory violation, I will open an issue in the rustc repo).

This PR is important because it fixes the definition of `c_long` and `c_ulong`. Without these fixes, rustc crash with the error:

```
Cannot emit physreg copy instruction
UNREACHABLE executed at /checkout/src/llvm/lib/Target/X86/X86InstrInfo.cpp:5778!
```

Related https://github.com/rust-lang/rust/issues/37976

SYS_* constants are of type long in Android

The SYS_* constants should be `c_long` as `syscall` expect a `c_long` as first argument and in Android headers, there is no sign that these constants should be `unsigned long`.

So the compilation targeting ARM Android fails for dependent crates using `syscall`.

Introduce pthread_cancel() for terminating threads

pthread_cancel() is safer way to terminate thread than pthread_kill().

This function can be found from ISO/IEC 9945-1:1996 (“POSIX.1”) and first introduced into Single Unix Specification version 2 on 1997.

add setfsgid/setfsuid on Linux

Add BOTHER & termios2 to Android & Linux

This should be the same for both the struct and the constant across all Linux/Android platforms, but we'll see!

Error was "bad pthread_cancel function pointer: rust: 8362822 (0x7f9b46) != c 8358779 (0x7f8b7b)"

Note that termios2 doesn't exist on powerpc(64), termios
is used instead.