[compiler-rt] [compiler-rt][ASan] Work around msvc cl x64 build warnings (PR #156887)

[Zack Johnson via llvm-commits]

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@@ -108,7 +108,8 @@ set(ASAN_CFLAGS ${SANITIZER_COMMON_CFLAGS})
 
 # Win/ASan relies on the runtime functions being hotpatchable. See
 # https://github.com/llvm/llvm-project/pull/149444
-if(MSVC)
+# MSVC cl 64 bit architectures treat /hotpatch as an unknown option
+if(CLANG_CL OR (MSVC AND "i386" IN_LIST ASAN_SUPPORTED_ARCH))
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zacklj89 wrote:

`CLANG_CL` is also used a few lines down to silence some other warnings related to MSVC. I'm wondering if I have something locally that is precluding me from seeing the same issues you are.

https://github.com/llvm/llvm-project/pull/156887