Cherry-Pick: Chroot update script to force setup board for kiev.

This is to transition from a 32bit to 64bit build.

BUG=chrome-os-partner:11058
TEST=build_packages for board=kiev. Verify choot upgraded.

Change-Id: Ib0d411b564319a3267a53b9ee469edd502a32bdc
Original-Change-Id: I251be4eba14ba407cfbc6ecf4fb089efe7d457e8
Reviewed-on: https://gerrit.chromium.org/gerrit/26743
Reviewed-by: Dave Parker <dparker@chromium.org>
Tested-by: Dave Parker <dparker@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27587
1 file changed