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

[Paschalis Mpeis via llvm-commits]

paschalis-mpeis wrote:

Hey @Jinjie-Huang,

Unfortunately this patch has broken some of the AArch64 buildbot builders, so I suggest we revert it for now:
- #160664

Please have a look at: [#5476](https://lab.llvm.org/staging/#/builders/219/builds/5476), all builders are [here](https://lab.llvm.org/staging/#/builders?tags=%2Bbolt&tags=%2Baarch64)


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