[llvm] [XCOFF] Use RLDs to print branches even without -r (PR #74342)

[via llvm-commits]

stephenpeckham wrote:

The current llvm-objdump code does not handle fixed-up relocations. I was going to add this in a separate PR, but it really needs to be include in this PR.  A testcase requires a linked program, which is not supported yet by yaml, so a test will have to be added later. With the latest update, a branch to fixup code prints a comment for the target symbol.  The comment is not printed if -r is used.

https://github.com/llvm/llvm-project/pull/74342