Makefile:Improve help and readme

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
Makefile:Fix livesuit target

Fix for
./sunxi-bsp/sunxi-tools/fex2bin: not found
make: *** [livesuit] Error 127

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
update submodules
mk_livesuit_img.sh: Fix _Z6printfPcz problem.

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
update submodules
update submodules

Fixes wrong hash problem caused by previous commit

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
Makefile:Fix "hwpack-install" target.

Problem and fix was found by LoCoZeNoz_ZUE

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
update sunxi-boards and sunxi-tools submodules

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
update u-boot submodule and adapt to new falcon binary format

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
update linux-sunxi submodule.

Use sunxi-3.4 now. Now a20 is also supported.

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>
update u-boot and sunxi-boards submodules.

This commit should fix case sensitive targets.

Signed-off-by: Jari Helaakoski <tekkuli@gmail.com>