[llvm] Change update_xxx_checks to continue on error when processing mutliple inputs (PR #137728)

[Gaëtan Bossu via llvm-commits]

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

LGTM, and thanks for doing this! :) I was slightly afraid when looking at the diff at first, but ignoring whitespaces makes it surprisingly concise!

There are some test failures in `update_mc_tests` though, so I guess you want to look at those before merging.

https://github.com/llvm/llvm-project/pull/137728