extract_files: Add support for paths without system/

Sometime blob directories are contained in dirs not named system
(ex. extracting blobs from another vendor dir) so check if the file
exists without system/ before appending "system/" to filenames.

Change-Id: I4ba946e178260b4f4804b1ac4422645e3085c665
1 file changed
tree: 4383b70600c6429d0e4a91d0c16e91dce00b23b3
  1. templates/
  2. extract_utils.sh
  3. sdat2img.py