[PATCH] D28316: [libc++] Cleanup and document <__threading_support>

[Saleem Abdulrasool via Phabricator via cfe-commits]

compnerd accepted this revision.
compnerd added a comment.
This revision is now accepted and ready to land.

This seems much better organized I think, and easier to follow.  Thanks for the docs on the various options!


https://reviews.llvm.org/D28316