[clang] [Sema] Add original GH192264 reproducer as a section-conflict regression test (PR #202276)

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<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: lijinpei-amd

<details>
<summary>Changes</summary>

Follow up of https://github.com/llvm/llvm-project/pull/200873

---
Full diff: https://github.com/llvm/llvm-project/pull/202276.diff


1 Files Affected:

- (modified) clang/test/SemaCXX/attr-section.cpp (+8) 


``````````diff
diff --git a/clang/test/SemaCXX/attr-section.cpp b/clang/test/SemaCXX/attr-section.cpp
index 95d4fc53ebe6c..f8ac9131f06ff 100644
--- a/clang/test/SemaCXX/attr-section.cpp
+++ b/clang/test/SemaCXX/attr-section.cpp
@@ -84,3 +84,11 @@ auto lambda = [](int val) __attribute__((section("lambda_op_pragma"))) { return
 #pragma clang section bss="lambda_op_pragma" // expected-error {{this causes a section type conflict with 'operator()'}}
 #pragma clang section bss=""
 } // namespace lambda_call_operator_pragma
+
+// original: https://github.com/llvm/llvm-project/issues/192264
+namespace GH192264_original {
+struct S {};
+using F = decltype([](auto val) // expected-note {{declared here}}
+__attribute__((section("gh192264"))) const S s{}; // expected-error {{expected body of lambda expression}}
+__attribute__((section("gh192264"))) int i{}; // expected-error {{'i' causes a section type conflict with 'operator()'}}
+} // namespace GH192264_original

``````````

</details>


https://github.com/llvm/llvm-project/pull/202276