[llvm] [MC] Add .loc_label instruction (PR #99710)

[Paul T Robinson via llvm-commits]

https://github.com/pogo59 commented:

Thanks for handling the repeated directive case!

Looks like the test does not check that the line-table labels are emitted in the right places. I'm not 100% sure how to do that, but probably dumping .symtab would show them?

https://github.com/llvm/llvm-project/pull/99710