[llvm] [Utils][update_mc_test_checks] Generate check lines in alphabetical order. (PR #164424)

[Brox Chen via llvm-commits]

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

LGTM

To avoid the issue Joe mentioned we can add an option such as "-checklineorder" and make alphabetic order as default . But maybe not worth it

https://github.com/llvm/llvm-project/pull/164424