[llvm] [clang] Reapply #2 [clang-repl] [test] Make an XFAIL more precise (#70991) (PR #71168)

[Jonas Hahnfeld via cfe-commits]

https://github.com/hahnjo approved this pull request.

Looks reasonable to me. I know this fixes a test error for MinGW, but if possible maybe let it sit until early next week in case somebody else has a different opinion on moving `host=` to `lit`.

https://github.com/llvm/llvm-project/pull/71168