[libc-commits] [libc] [libc][docs] adds macro handling, POSIX status, and validation to docgen (PR #89421)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

Thanks @enh-google ! @Flandini let's use `POSIX.1-2017` then?  When 2024 edition is published, we can update this field name.

https://github.com/llvm/llvm-project/pull/89421