Comment 13 for bug 530584

This is somewhat related to the more generic bug #364336. That one is about allowing a user to say "this file is deleted, ignore changes from merge sources, rather than giving me conflicts". *This* bug is a bit more specific to how the package importing process is run. They aren't dupes because:
 1) If we solved bug #364336, then to solve this we would need to teach the importer how to mark those files as uninteresting.
 2) We could solve this one with very specific logic in the importer, wrt auto generated files, etc.