[clang] Reapply "[Driver][OHOS] Fix lld link issue for OHOS (#118192)" (PR #120159)

[Nico Weber via cfe-commits]

nico wrote:

I did remove the contents of out/gn/lib/clang/20/lib/linux, but `./lib/clang/20/lib/linux/libclang_rt.builtins-x86_64.a` just reappeared on the next build.

I'm guessing this might break tests in cmake builds that use `-DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF` (?)

http://45.33.8.238/linux/156390/step_6.txt

https://github.com/llvm/llvm-project/pull/120159