Chromebook kernel / Replace alarm/uboot-mkimage

Kernel for ARM Chromebook using nv-U-Boot.

Please see:
http://www.chromium.org/chromium-os/how-tos-and-troubleshooting/using-nv-u-boot-on-the-samsung-arm-chromebook

Also please see my post to Linux on ARM Google+ community for details on a more "permanent" nv-U-Boot method.

uboot-mkimage:
The original uboot-mkimage did not have FIT image feature needed for creating kernels on Chromebook.