linux-boundary: Add support for 3.10.17-beta

This patch adds experimental support for the 3.10.17-beta kernel
for Boundary Devices BD-SL-i.MX6 (built to SABRE Lite), Nitrogen6X,
and Nitrogen6_Lite boards.

To try it out, set PREFERRED_VERSION_linux-boundary = "3.10.17"
in your local.conf file.

Most functionality has been tested as detailed on this page:
	http://boundarydevices.com/mx6-linux-kernel-3-10-17-beta/

Testing has been limited though, so don't expect it to be
production-ready.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
u-boot-script-boundary: update to latest revision on Github

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
u-boot-script-boundary: Allow board-specific boot scripts

This update allows board directories to over-ride the boot script
(6x_bootscript-yocto.txt) or upgrade script (6x_upgrade.txt).

This is a bit complicated because the Yocto MACHINE variable
is not the same as the board directory (u-boot/board/boundary/x)
in either the imx6qsabrelite or nitrogen6x-lite case.

The scripts in board/boundary/nitrogen6x/ are used as a default
if a board doesn't override them.

Note that the boot scripts are only partially functional at this
stage, since there are references to named panels which are not
yet supported.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
imx6qsabrelite: Add myself as maintainer

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nitrogen6x: Add myself as maintainer

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
nitrogen6x-lite: Add myself as maintainer

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>