core: Add --delete option for fsck
core: Add --delete option for fsck

Useful to clean up any broken objects.

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