[lld] [llvm] [MC] Honour alignment directive fill value for non-intel (PR #100136)

[Sam Elliott via llvm-commits]

lenary wrote:

Re-reading the [release update](https://discourse.llvm.org/t/update-on-llvm-19-x-releases/80511?u=lenary), I'm not convinced that this is an important enough bugfix for a backport - the bug has been open since 2016 without anyone else working on it.

https://github.com/llvm/llvm-project/pull/100136