[llvm] [BOLT][AArch64] Skip as many as possible zero's in padding validation (PR #166467)

[Amir Ayupov via llvm-commits]

https://github.com/aaupov approved this pull request.

Please retitle as "[BOLT][AArch64] Skip as many zeros as possible in padding validation".
Approving but please let ARM folks weigh in.

https://github.com/llvm/llvm-project/pull/166467