data: add reference image files for weston-ivi-shell-user-interface

- introduces reference images used by weston-ivi-shell-user-interface.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
14 files changed