[llvm] [BOLT][AArch64] Fix static binary patching for ELF. (PR #97710)

[Pavel Samolysov via llvm-commits]

samolisov wrote:

As I see, this branch has not been rebased on top of the recently merged changes with the introduction of the `createDummyReturn` function (or the final version of its name).

Please, rebase the branch to distinguish the correct set of changes, what makes the review much simpler.

https://github.com/llvm/llvm-project/pull/97710