#160404

- Implement POSIX function "faccessat"
- Remove redundant param in facessat syscall in access implementation,
faccessat syscall does not take a flags arg

This patch adds some hdrgen yaml for ioctl(). Otherwise the function
never actually ends up being available in a full build. This is the last
thing that is needed to enable turning on LIBCXX_ENABLE_RANDOM_DEVICE.

Remove all the .h.def files that already express nothing
whatsoever not already expressed in YAML.  Clean up a few YAML
files without materially changing any generated header output.

Many more .h.def files remain that need a bit of conversion in
YAML to express macro requirements and such.

RV32 uses SYS_utimensat_time64 instead of SYS_utimensat but the call is
the same.

RV32 uses SYS_ppoll_time64 instead of SYS_ppoll, but the call is the
same.

#133983

This pull request implements the `utimes` command in libc ([Issue
#133953](https://github.com/llvm/llvm-project/issues/133953)).

- [x] Add the implementation of `utimes` in `/src/sys/time`.
- [x] Add tests for `utimes` in `/test/src/sys/time`. 
- [x] Add `utimes` to
[entrypoints.txt](https://github.com/llvm/llvm-project/blob/main/libc/config/linux/x86_64/entrypoints.txt)
for at least x86_64 and whatever you're building on
- [x] Add `utimes` to
[include/sys/time.yaml](https://github.com/llvm/llvm-project/blob/main/libc/include/sys/time.yaml)

Closes #124694.

This patch adds the `sys/uio/readv` function.
ref:
https://pubs.opengroup.org/onlinepubs/009696699/functions/readv.html

Fixes: #124149

Closes #124633.

Some parameter types in the definition of `{get, set}rlimit` currently
do not match the standard. This patch resolves the issue.
ref: https://man7.org/linux/man-pages/man2/getrlimit.2.html