Stub out easter egg, in case BIOS wants to implement one.

BUG=none
TEST=manual

Type 'xyzzy' at dev-mode BIOS screen. What happens next depends on the BIOS.

Change-Id: Ifdb49eb6cb53ecee91f576be91679bd5a232f008
Reviewed-on: http://gerrit.chromium.org/gerrit/7656
Tested-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
4 files changed