[clang] Reland "[clang][modules] Print library module manifest path." (PR #82160)

[Mark de Wever via cfe-commits]

mordante wrote:

> @mordante if we want this for 18, we need to land and backport it in this week.

Thanks for the reminder, it got a bit under my radar. I'll ask a backport tomorrow unless a CI starts to complain again.

https://github.com/llvm/llvm-project/pull/82160