linux-qcom-bootimg.inc: create boot images for LK
linux-qcom-bootimg.inc: create boot images for LK

Add support for building the custom boot.img that can be booted on targets
running LK/fastboot. It takes care of the dt image creation as well, which needs
to be appended to the boot image.

Signed-off-by: Nicolas Dechesne <05fca36dfcf68f7e1c9eaf62b074676ab50a133b@linaro.org>

ndechesne/meta-qcom,ndechesne/meta-qcom,ndechesne/meta-qualcomm,ndechesne/meta-qcom