extract-utils: Add prepare_firmware function

Allows devices to run required actions before attempting
to extract firmware.
Example: motorola star images & pixel fbpk images.

Change-Id: I105c3a17c10f63f0ad72966354aed6baed695d7c
1 file changed
tree: 7eaed66eb081925c94e7e66379466760893a6991
  1. templates/
  2. extract_ota.py
  3. extract_utils.sh
  4. sdat2img.py
  5. sort-blobs-list.py