Do not cleanup args.gn imports located in the output directory. gn cleanup should keep files that are imported by args.gn and located in the output directory. Change-Id: I98116dd3f57765a5c160d7b82bd8104a747dd469 Reviewed-on: https://gn-review.googlesource.com/c/gn/+/17360 Commit-Queue: Takuto Ikuta <[email protected]> Reviewed-by: Dirk Pranke <[email protected]> Reviewed-by: Takuto Ikuta <[email protected]>