[libcxx-commits] [libcxx] [libc++][modules] Adds module testing. (PR #76246)

[Mark de Wever via libcxx-commits]

mordante wrote:

btw it would be great if this configuration could be tested in the libc++ pre-commit CI. That would help us to prevent breaking your setup. Please reach out to libcxx on Discord if you want to add a buildbot.

https://github.com/llvm/llvm-project/pull/76246