[clang] [clang-tools-extra] [clang-tidy] Avoid processing declarations in system headers (PR #128150)

[Gábor Horváth via cfe-commits]

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@@ -449,6 +453,7 @@ ClangTidyASTConsumerFactory::createASTConsumer(
   }
 
   std::vector<std::unique_ptr<ASTConsumer>> Consumers;
+
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Xazax-hun wrote:

Nit: is this an intended change?

https://github.com/llvm/llvm-project/pull/128150