tools/wltests: Add support for abootimg
Created by: Leo-Yan
This patch is to support abootimg to generate boot.img, so finally this can be used by UEFI bootloader; Using abootimg tool it can simplize the booting images by combining Kernel image and DTB image into single file.
This patch is to add variable 'BOOTLOADER' to distinguish if the bootloader is "fastboot" mode or UEFI mode; also add a dedicated script tools/wltests/android/create_aboot_img.sh for abootimg building.
Signed-off-by: Leo Yan leo.yan@linaro.org