[compiler-rt] Test fixups for MSVC. (PR #109887)

[Charlie Barto via llvm-commits]

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@@ -18,6 +18,10 @@
 // it works with the dynamic runtime.
 // XFAIL: target={{.*netbsd.*}} && !asan-dynamic-runtime
 
+#if _MSC_VER && !defined(__clang__)
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barcharcraz wrote:

done and I've also grepped for relevant cases, I avoided changing anything outside of compiler-rt 

https://github.com/llvm/llvm-project/pull/109887