Close DFU devices as soon as possible after the transfer has completed
Close DFU devices as soon as possible after the transfer has completed

This allows clients like 'dfu-tool watch' to report the status values correctly.

vathpela/fwupd,fwupd/fwupd,fwupd/fwupd,vathpela/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,vathpela/fwupd,hughsie/fwupd,superm1/fwupd,superm1/fwupd,superm1/fwupd,vathpela/fwupd,hughsie/fwupd