[compiler-rt] [asan] Implement interception on AIX (PR #131870)

[Hubert Tong via llvm-commits]

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@@ -31,10 +31,22 @@ void InitializePlatformInterceptors();
 // really defined to replace libc functions.
 #if !SANITIZER_FUCHSIA
 
+// AIX currently can't retrieve the address of longjmp
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hubert-reinterpretcast wrote:

Add TODO comment to investigate using `longjmpx` (and also intercepting it).

Also, for all "AIX currently can't retrieve the address of [ ... ]" comments, the correct phrasing is "Sanitizer on AIX is currently unable to retrieve the address of the real [ ... ] (or an alternative thereto)".

https://github.com/llvm/llvm-project/pull/131870