[waffle] [PATCH 16/33] third_party/threads: import c11 threads emulation wrappers

[Chad Versace]

Emil,

I'm finished reviewing for today, and am stopping here at patch 16. I'll
resume reviewing tomorrow.

I see that you're collecting reviewed-by tags and cleanups on versioned
brancehs (for-upstream-3.*). I will defer cherry-picking patches off the
mailing list onto master; and instead will wait for you to send merge
requests, because I assume that was your intended workflow. If you want
to do things differently, let me know.