[Yocto 2388]
Create a deploy image tool using the existing dialog including
DeployImageDialog and ImageSelectionDialog.
This tool writes bootable images to USB devices, and it can be run
directly without hob.
Signed-off-by: Kang Kai <kai.kang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>