scripts: add sign tool [1/1]

PD#SWPL-98728

Problem:
add sign tool.

Solution:
add sign tool.

Verify:
A113L_AD403

Signed-off-by: yang.li <yang.li@amlogic.com>
Change-Id: Id6cd1196eb66f9b650562092fc7ef80d1e2cdab6
7 files changed