xenclient-installer-image: add network device support

Pulled a few packages listed in the ndvm image to support
network devices and copied them into the installer image.

OXT-56

Signed-off-by: Chris Patterson <pattersonc@ainfosec.com>
Merge pull request #31 from cjp256/oxt-56-v2

xenclient-installer-image: add network device support