[clang] Headers: prefer `corecrt_malloc.h` to `malloc.h` (PR #131668)

[Saleem Abdulrasool via cfe-commits]

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@@ -13,7 +13,7 @@
 #include <stdlib.h>
 
 #ifdef _WIN32
-#include <malloc.h>
+#include <corecrt_malloc.h>
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compnerd wrote:

Thanks for the typo correction!

I think that I can add in a `!defined(__MINGW32__)` condition.

https://github.com/llvm/llvm-project/pull/131668