packaging: Update spec file per Fedora review
packaging: Update spec file per Fedora review

See https://bugzilla.redhat.com/show_bug.cgi?id=819951

leandrosansilva/ostree,sujitfulse/ostree,GNOME/ostree,sujitfulse/ostree,leandrosansilva/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,leandrosansilva/ostree,gatispaeglis/ostree,leandrosansilva/ostree,resin-io/ostree,resin-io/ostree,gatispaeglis/ostree,gatispaeglis/ostree,resin-io/ostree,GNOME/ostree,resin-io/ostree,sujitfulse/ostree,gatispaeglis/ostree,GNOME/ostree,leandrosansilva/ostree,resin-io/ostree,sujitfulse/ostree,sujitfulse/ostree,gatispaeglis/ostree