[llvm] [AArch64][BOLT] Ensure tentative code layout for cold BBs runs. (PR #96609)

[Pavel Samolysov via llvm-commits]

https://github.com/samolisov commented:

@paschalis-mpeis Thank you for the patch. LGTM, but I worked with a rewritten tentative layout analysis and may not remember all the specific details of the mainline version. So, this will be great if you can wait for an approve for a more experienced bolt developer. Thank you.

https://github.com/llvm/llvm-project/pull/96609