[libc-commits] [libc] [libc] revert all process_mrelease changes (PR #118650)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

hmm...bots have been green now for a while...

> Some buildbots are using old environment, so it is better to guard the tests.

I've been meaning to explicitly document that llvm-libc will only support Linux kernel versions listed on kernel.org.  Part of that is ensuring our buildbots are actually running LTS kernels (which I haven't done yet)! If we can move CI to qemu, this makes things simpler as its easier to update qemu than a whole linux distro the buildbot is running.

https://github.com/llvm/llvm-project/pull/118650