-enable using -DWITH_WAYLAND=ON
-adapted from https://github.com/pfpacket/opencv-wayland
-using xdg_shell stable protocol
-overrides HAVE_QT if HAVE_WAYLAND and WITH_WAYLAND are set
Signed-off-by: NJoel Winarske <joel.winarske@gmail.com>
Co-authored-by: NRyo Munakata <afpacket@gmail.com>