ilmControl: bug fix. LayerManagerControl set position doesn't work.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
weston-ivi-shell: Copy the latest ivi-layout-export.h from IVI-Shell.
weston-ivi-shell: Move screenshot function from IVI-Shell

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>