[compiler-rt] [ASan] Change strdup interceptor to allow null input on Windows (PR #122803)

[Zack Johnson via llvm-commits]

zacklj89 wrote:

Thanks for your review, @fmayer! 👍 

I'll go ahead and merge this since everything passed in the previous revision and the latest is just updating EOL.

https://github.com/llvm/llvm-project/pull/122803