factory_reset: Fix cutoff script location.

The battery cutoff scripts have been changed both folder name and main
script file name (from battery_cutoff.sh to cutoff.sh) so we have to
also change installer code.

The original code also has a typo - should be DIR, not SCRIPT.

BUG=chromium:577601
TEST=build_image factory_install; boot to menu; action 'r'.

Change-Id: I7318a9798f59ffa48d164dfe0e96b1cb05e03bc8
Reviewed-on: https://chromium-review.googlesource.com/410522
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Chun-Tsen Kuo <chuntsen@chromium.org>
1 file changed