deploy: Do a full system sync after writing bootloader config
deploy: Do a full system sync after writing bootloader config

This is just something I noticed on inspection; we should catch any
changes to /boot in the sync(), even though theoretically gio should
have done fdatasync().

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