core: Check out files before directories
core: Check out files before directories

Otherwise we pretty easily hit maximum FD limits =(

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