[libc-commits] [libc] [libc] check a few syscall #'s to avoid wrong syscalls (PR #123100)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google approved this pull request.

LGTM overall, though I do wonder if we should skip the `defined(__NR_iodestroy)` check since I'd guess it's likely to change in the future.

https://github.com/llvm/llvm-project/pull/123100