[llvm] [BOLT][DWARF] Skip processing DWARF CUs with a DWO ID but no DWO name. (PR #154749)

[Jinjie Huang via llvm-commits]

Jinjie-Huang wrote:

It's now modified to check for CUs without a dwo_name inside registerUnit.

https://github.com/llvm/llvm-project/pull/154749