[libc] [llvm] [RFC][libc] Codify header inclusion policy (PR #87017)

[Nick Desaulniers via llvm-commits]

================
@@ -219,7 +219,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.sys.epoll.epoll_pwait
     # TODO: Need to check if pwait2 is available before providing.
     # https://github.com/llvm/llvm-project/issues/80060
-    # libc.src.sys.epoll.epoll_pwait2
+    libc.src.sys.epoll.epoll_pwait2
----------------
nickdesaulniers wrote:

dropped in https://github.com/llvm/llvm-project/pull/87017/commits/4e2833ab58e1d64c95cda19338370899f62d15fd

https://github.com/llvm/llvm-project/pull/87017