[llvm] [TOOLS][DWARFDUMP][DWARF] Print full DIE offset for a CU or local TU (PR #121877)

[Greg Clayton via llvm-commits]

https://github.com/clayborg requested changes to this pull request.

The DIE offset information will be incorrect for CU entries in split DWARF. We should be also able to find the foreign TU offset, since CUs in split DWARF are just like foreign type units. See inline comments for details.

https://github.com/llvm/llvm-project/pull/121877