db845c: Update userland build to use dragonboard-kernel project and build boot.img

This patch updates the userland build to built a boot.img
from prebuilt kernel/modules in the dragonboard-kernel project.

At the moment, there is nothing in the dragonboard-kernel
project, but once we do add the prebuilt files, we'll want
this change.

Change-Id: I6b9ce745c378ea50e176e9c8ed67336953766fa2
Signed-off-by: John Stultz <john.stultz@linaro.org>
4 files changed