[libc-commits] [libc] [libc] process mrelease (PR #119147)

[Michael Jones via libc-commits]

https://github.com/michaelrj-google commented:

a couple of nits, but looks fine overall.

Ideally the test would have both a trivially failing call and a trivially succeeding call, to exercise both sides of the branch.

https://github.com/llvm/llvm-project/pull/119147