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.

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

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.

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

Motivation: there is no glibc wrapper for this syscall

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

Unfortunately, these differ on Haiku, and using #[cfg(...)] is
not allowed in unix/mod.rs.