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>
[OXT-23] Use common license directory for OXT recipes.

OXT has historically referenced the license in the TOPDIR of the
xenclient-oe repo. As we make this repo a meta layer TOPDIR ends up
pointing elsewhere. As such it's much easier to use the GPLv2 and MIT
license files from the common license dir provided by OE core.
Merge pull request #31 from cjp256/oxt-56-v2

xenclient-installer-image: add network device support
Merge pull request #32 from flihp/master

[OXT-23] Use common license directory for OXT recipes.
Merge pull request #30 from jean-edouard/master

[alsa-lib] use /etc/asound/asound.conf instead of /etc/asound.conf