[compiler-rt] [compiler-rt][asan][tests] Stabilize wchar tests on Darwin/Android (PR #161624)

[Thurston Dang via llvm-commits]

thurstond wrote:

> Android tests keep `%env_asan_opts=log_to_stderr=1` to ensure the header is on stderr. If you prefer strict “revert to green” for both PRs first, I’m happy to also prepare a manual revert of the original PR #160493 despite conflicts.

With the revert of this fix-forward landed, the issues on the original patch (Android, Chromium etc.) are going to break those bots again. Moreover, at this point, the Darwin bots would been broken for 5+ days.

https://github.com/llvm/llvm-project/pull/162021 will revert the base patch.

https://github.com/llvm/llvm-project/pull/161624