[compiler-rt] [compiler-rt][asan] Reland: wcscpy/wcsncpy interceptors and stabilize wchar tests on Darwin/Android (PR #162028)

[Thurston Dang via llvm-commits]

thurstond wrote:

Could you please make this pull request a stack of three commits (in one pull request):
- reland #160493
- reland #161624 (fix #1)
- new fix (DAG group?)

It would make this much easier to see what's been fixed. (The commits will be automatically squashed before merging, so it won't negataively affect the LLVM commit history.)


https://github.com/llvm/llvm-project/pull/162028