[llvm-branch-commits] [BOLT] Fix merge-fdata for memory events (PR #128108)

[Amir Ayupov via llvm-branch-commits]

https://github.com/aaupov created https://github.com/llvm/llvm-project/pull/128108

Don't attempt to parse mispredictions for memory entries in LBR profile.

Test Plan: added merge-fdata-mem-prof.test