[lld] [LLD] Tombstone LocalTU entry in .debug_names (PR #70701)

[Alexander Yermolovich via llvm-commits]

ayermolo wrote:

> > Updated with more generic version. Step in right direction?
> 
> I think it's probably going in the right direction - though I'm not sure we'll be quite able to figure out the right thing without some more lld expertise. But trying to make what progress we can in the interim.

Anyone else we can rope into this?

https://github.com/llvm/llvm-project/pull/70701