[clang] [NFC][clang] Update ubsan-trap-merge.c test to show absence of nomerge in non-trap mode (PR #119280)

[Thurston Dang via cfe-commits]

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@@ -0,0 +1,113 @@
+// NOTE: Assertions have mostly been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
+// The most important assertion is the attributes at the end of the file, which
+// shows that -ubsan-unique-traps does not attach 'nomerge' to each ubsan handler.
+//
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -fsanitize=signed-integer-overflow -O3 -mllvm -ubsan-unique-traps %s -o - \
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thurstond wrote:

Done

https://github.com/llvm/llvm-project/pull/119280