[libcxx-commits] [libcxxabi] [libunwind][libc++][libc++abi] Add cross-compilation flags to tests (PR #67201)

[Louis Dionne via libcxx-commits]

ldionne wrote:

You could add it to all the `.cfg.in` files (I think we agree that it's what makes sense in theory) and then see whether the flags change in the configurations tested in the CI.

https://github.com/llvm/llvm-project/pull/67201