[llvm] [BOLT] Reduce NameResolver memory usage during file object discovery (PR #212625)

[Amir Ayupov via llvm-commits]

https://github.com/aaupov commented:

What happens in the event of hash collision? Some local symbol will just get a random (/5) suffix instead of /1? Do we have any places that rely on sequential numbering of suffixes?

https://github.com/llvm/llvm-project/pull/212625