verify_rootfs_chksum.sh: use key=val arguments for verity

The script was failing because it used positional arguments to verity,
but verity now expects key=val style arguments.

To make the script easier to debug the arguments to verity are now
printed before invoking it.

BUG=chromium:801865
TEST=Inside the chroot run "./verify_rootfs_chksum.sh --image path/to/image.bin". Should print out "Root filesystem checksum match!".

Change-Id: I5bb1b0b741d42e156d1babc28a426dd2046be566
Reviewed-on: https://chromium-review.googlesource.com/866059
Commit-Ready: Nicholas Bishop <nbishop@neverware.com>
Tested-by: Nicholas Bishop <nbishop@neverware.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed