vboot_reference: add "set_gbb_flags" script.

A simple script to help setting GBB flags on-the-fly, with help information for
flag value meanings.

BUG=chrome-os-partner:10389
TEST=./set_gbb_flags.sh 0x20
     ./set_gbb_flags.sh 0x0

Change-Id: Ic624f76c0897a1cbda876f3073b36f7c6425b5d4
Reviewed-on: https://gerrit.chromium.org/gerrit/26224
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
1 file changed