Don't package match when given a tarball

[rkoster]

Package matching is great for itterating on a release, but when a tarball is provided, the changes of amatch are slim to none. Before this change, tarballs would be repackaged even if no matches where found.

[jpalermo]

Concern we found at the FIWG meeting. It seems likely that the current change breaks uploading a release yaml file.