Copy the kernel to the ESP if necessary
Copy the kernel to the ESP if necessary

Systems that have grub configured to boot the kernel from the ESP will need
to have the kernel copied out of the image into the ESP for now until we
add support for providing additional update engine payloads.

mjg59/update_engine,endocode/update_engine,mjg59/update_engine,endocode/update_engine,endocode/update_engine,mjg59/update_engine