[llvm] [BOLT] Fix mustSkip when symbol's name changed by BOLT (PR #99463)

[Maksim Panchenko via llvm-commits]

maksfb wrote:

IMHO, it's reasonable for BOLT to accept a local name without a prefix if we didn't match any global name and there's no ambiguity in local name matching. 

https://github.com/llvm/llvm-project/pull/99463