Blacklist automatically generated files

[apokralipsa]

Some files are automatically generated and probably should not be included in the KUP report.

An example is a package-lock.json containing the versions of dependencies pulled in by npm. It needs to be committed as it is used in the CI to enforce repeatable builds.

We could provide a blacklist in the shouldBeIncludedInKUP function in the format-kup-report.awk file. It would need to receive the file name.

If the idea is ok I can provide a pull request.