[llvm] [BOLT] fix print-mem-data not working (PR #156332)

[Paschalis Mpeis via llvm-commits]

paschalis-mpeis wrote:

Merging as @Jianghibo does not have the [necessary permissions](https://github.com/llvm/llvm-project/pull/155613#issuecomment-3280368490).

https://github.com/llvm/llvm-project/pull/156332