[llvm] [llvm][MC][ARM][Assembly] Emit relocs for LDRs (PR #72873)

[David Spickett via llvm-commits]

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

I know you've talked to @smithp35 offline, so this LGTM.

https://github.com/llvm/llvm-project/pull/72873