[clang] [llvm] [UBSan] Implement src:*=sanitize for UBSan (PR #140529)

[Vitaly Buka via cfe-commits]

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@@ -103,6 +101,22 @@ supported sanitizers.
     char c = toobig; // also not instrumented
   }
 
+Conflicting entries are resolved by the latest entry, which takes precedence.
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vitalybuka wrote:

If multiple entries match the source, than the latest entry takes the precedence.

https://github.com/llvm/llvm-project/pull/140529