[llvm] [BOLT][NFC] Add split-dwarf5 test with multiple CUs (PR #93744)

[Alexander Yermolovich via llvm-commits]

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@@ -0,0 +1,453 @@
+# clang++ -fbasic-block-sections=all -ffunction-sections -g2 -gdwarf-5 -gsplit-dwarf
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ayermolo wrote:

Was it generated with: -fdebug-compilation-dir

https://github.com/llvm/llvm-project/pull/93744