[llvm] [symbolizer] Empty string is not an error (PR #92660)

[James Henderson via llvm-commits]

jh7370 wrote:

@spavloff, there was still ongoing discussion with this ticket (from @dwblaikie and myself - I was on PTO much of last week, so hadn't had time to review the latest comments yet). Merging a change while discussion is ongoing, even if there was one approver, is generally frowned upon.

I haven't got the time now to read, digest, and respond to the latest version and comments yet, but I think this should be reverted pending the conclusion of these discussions.

https://github.com/llvm/llvm-project/pull/92660