[clang] [llvm] [sanitizer] Document AddressSanitizer security considerations (PR #100937)

[Vitaly Buka via llvm-commits]

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@@ -351,6 +353,14 @@ There are several limitations:
 * Check groups (like ``undefined``) can't be used in suppressions file, only
   fine-grained checks are supported.
 
+Security Considerations
+=======================
+
+UndefinedBehaviorSanitizer's runtime is meant for testing purposes and its usage
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vitalybuka wrote:

there is also trap mode which should be acceptable for production

https://github.com/llvm/llvm-project/pull/100937