recipes-graphics/wayland/weston: Add tile orientation states

recipes-graphics/wayland/weston: Add tile orientation states

This was recently integrated into libweston 11 pre-release, and should
be removed once yocto updates its libweston version to at least 11.

For the time being we'll rely on these to have split type of windows.

Bug-AGL: SPEC-3906
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I7bc5caa6126d36d843d0f00cde56c020fa3f97dc
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27906
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>