[compiler-rt] [rtsan] Intercept aligned_alloc on all versions of OSX if available on build machine (PR #112780)

[Vitaly Buka via llvm-commits]

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@@ -84,6 +84,10 @@
 #define SI_NOT_MAC 1
 #endif
 
+#if SANITIZER_APPLE
+#  include <Availability.h>
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vitalybuka wrote:

Maybe move 511-526 into this #if APPLE block?

https://github.com/llvm/llvm-project/pull/112780