Enable scripting support during the installation of system images with SWU. A new shell
script is included by default in all the SWU update packages that will be executed just
before the update starts and just after it finishes. The script is empty and contains two
place-holders that will be called in the two scenarios mentioned before.
Users can customize this script to execute specific actions based on their final product
needs or provide their own one by setting its location in the 'SWUPDATE_SCRIPT' variable.
While on it, rename the 'sw-description_template' file to 'sw-description-images_template'
as it is more accurate with the update mechanism it is used for.
Signed-off-by: David Escalona <david.escalona@digi.com>
David Escalona