[llvm] [llvm-c-test] Fix the usage message (PR #105702)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams commented:

Thanks, good spot.

Looking at it though, I think the original name `--test-dibuilder` from before all the renaming makes the most sense in today's state. I think we probably should've restored that name in the patch you linked - I probably just missed that at the time.

Could I be cheeky and ask that you invert your patch; change the flag name to `--test-dibuilder` (keep the existing usage message) and update `debug_info_new_format.ll` to use that flag?

https://github.com/llvm/llvm-project/pull/105702