[llvm] [BOLT][DWARF] Slice .debug_str from the DWP for each CU (PR #159540)

[Alexander Yermolovich via llvm-commits]

https://github.com/ayermolo commented:

Left some comments to put it on my radar. If that is ok, can deep dive into logic next week.

https://github.com/llvm/llvm-project/pull/159540