[libc-commits] [libc] [libc] Fix bugs found when testing with all headers (PR #144049)

[Michael Jones via libc-commits]

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

LGTM, thanks for the cleanup! I'll merge this for you once the presubmits finish

https://github.com/llvm/llvm-project/pull/144049