[llvm] [PassBuilder] Add RelLookupTableConverterPass to LTO (PR #124053)

[via llvm-commits]

gulfemsavrun wrote:

> > llvm/docs/ReleaseNotes.md is the place to add release notes for pipeline changes
> > I think for the final commit to have the commit message/description, the PR's title and first comment must contain it, at least for squash and merge like LLVM does
> 
> Agreed that's a best practice, but I'm pretty sure if you're merging through github UI you can also edit the commit message and title before landing.

Oh, I did not not realize that commit message is not updated after I updated in the branch itself. Fixed it now!

https://github.com/llvm/llvm-project/pull/124053