[llvm] [RuntimeDyld][ELF][AArch64] Fix resolveAArch64ShortBranch. (PR #92245)

[Alastair Houghton via llvm-commits]

al45tair wrote:

> I know this is causing some existing tests to fail, but is there any way to test this separately?

I guess in principle we might be able to add something to the ExecutionEngine tests. I should really have thought of that, but I've been rather focused on fixing the problem quickly to un-break the Swift build :-)

https://github.com/llvm/llvm-project/pull/92245