faft: Add the missing error lib on firmware_InvalidUSB

This lib is missing. Add it back.

BUG=chromium-os:19710
TEST=run_remote_tests.sh --remote=$IP firmware_InvalidUSB

Change-Id: Ie173f1adbc2c123e00980545ca086678e7bfb8a0
Reviewed-on: https://gerrit.chromium.org/gerrit/32534
Reviewed-by: Vic Yang <victoryang@chromium.org>
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed