mod_image_for_recovery: fix local for decrypt_stateful

Remove local from a variable defined at the script's top level.
Otherwise, when run with --decrypt_stateful fails with
"local: can only be used in a function".

BUG=none
TEST=create recovery image with decrypt_stateful flag

Change-Id: I56b68c80ed9efb6f4b6e8badbfbd88220262eb06
Reviewed-on: https://chromium-review.googlesource.com/703991
Commit-Ready: Andrey Pronin <apronin@chromium.org>
Tested-by: Andrey Pronin <apronin@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed