make_dev_firmware.sh: Correct firmware body size when changing rootkey.

make_dev_firmware.sh calls resign_firmwarefd.sh, which extracts rootkey from
input image for checking VBLOCK firmware body size. As a result, we should
resign firmware before changing rootkey / GBB.

BUG=chromium:365738
TEST=Install Nyan/Peppy PreMP-signed firmware, run make_dev_firmware.sh, and
     then boot in normal mode.
BRANCH=none

Change-Id: I45dbcacb40b7b77bbf89f1ba244bf7fb25f9ae27
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/196521
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
1 file changed