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

[Michael Jones via llvm-commits]

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@@ -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
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michaelrj-google wrote:

have all of the buildbots been updated to new enough kernel versions to support pwait2?

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