[llvm] [BOLT] Fix DWARF4/5 file index handling in debug info functions (PR #151401)

[Alexander Yermolovich via llvm-commits]

================
@@ -0,0 +1,20 @@
+// Check that BOLT correctly handles two CUs with DWARF-5 debug info (does not crash).
----------------
ayermolo wrote:

Add that inlining is part of this test.

https://github.com/llvm/llvm-project/pull/151401