[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:

Thanks! Looks good to me, but prior to merging I'd like to get @wrotki's feedback (perhaps with testing on one of their Darwin buildbots if possible?).

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