[clang] [CIR] Correct union lowering behavior re-padding (PR #216349)

[Andy Kaylor via cfe-commits]

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@@ -63,3 +76,4 @@ extern "C" Trivial ret_trivial() { return {}; }
   // OGCG: %[[COERCE_DIVE:.*]] = getelementptr inbounds nuw %union.Trivial, ptr %[[RET_ALLOCA]], i32 0, i32 0
   // OGCG: %[[RET:.*]] = load i32, ptr %[[COERCE_DIVE]]
   // LLVM: ret i32 %[[RET]]
+
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andykaylor wrote:

Extra new line at the end of the file.

https://github.com/llvm/llvm-project/pull/216349