[llvm] [BOLT][AArch64] Run LDR relaxation (PR #165787)

[Maksim Panchenko via llvm-commits]

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

LGTM - thanks! I'd wait before the commit for others to review (@paschalis-mpeis,  @yavtuk, @bgergely0).

https://github.com/llvm/llvm-project/pull/165787