[lld] [lld][ELF] Prefer non-zero-range FDEs when building .eh_frame_hdr (PR #218127)

[Peter Smith via llvm-commits]

smithp35 wrote:

Thank you for the patch. I've added myself and MaskRay as reviewers. I'm out of office for a lot of this week so if I don't get to it this week I'll pick this up next Tuesday unless someone else can review first.

I think it is the right thing to do. It looks like GNU ld takes account of zero size PC ranges when constructing its .eh_frame_hdr.  

https://github.com/llvm/llvm-project/pull/218127