qt5wayland: new package

qt5wayland: new package

QtWayland is a Qt 5 module that wraps the functionality of Wayland.

Cc: Julien Corjon <corjon.j@ecagroup.com>
Cc: Brent Sink <brents_3@hotmail.com>
Cc: Naoki Matsumoto <n-matsumoto@melcoinc.co.jp>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
[Arnout:
 - select wayland instead of depending on it;
 - propagate jscore dependency from qt5declarative
 - re-order select/depends statements
 - rewrite comment to only refer to GL backend (jscore is an arch
   dependency)
 - rewrap help text of BR2_PACKAGE_QT5WAYLAND_COMPOSITOR]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>