[llvm] Fix crash from [CGData] Global Merge Functions (#112671) (PR #116241)

[Zhaoxuan Jiang via llvm-commits]

================
@@ -0,0 +1,6 @@
+; This test checks if the global merge func pass should not build module summary.
----------------
nocchijiang wrote:

Just a nitpick: should we move the test file into `llvm/test/CodeGen/AArch64/` or even `llvm/test/CodeGen/Generic/` since this is not a ThinLTO/backend-specific test?

https://github.com/llvm/llvm-project/pull/116241