[libc-commits] [libc] [libc][annex_k] Add errno_t. (PR #163094)

[Victor Campos via libc-commits]

vhscampos wrote:

Another issue: `errno_t` never makes into `errno.h` because `errno.h.def` doesn't have a placeholder to emit the public API from `errno.yaml`.

https://github.com/llvm/llvm-project/pull/163094