[clang] [compiler-rt] [llvm] Skipping host target exports during cross-compilation (PR #209922)

[Martin Storsjö via cfe-commits]

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

This version of the PR works for me (but I haven't verified that it actually resolves the problem that you're trying to fix - I presume you did that).

Just two minor tweak suggestions, otherwise this looks good to me.

https://github.com/llvm/llvm-project/pull/209922