wayland: Don't claim to support selection notification
wayland: Don't claim to support selection notification

We don't support selection notification, so don't claim
we do, only to fail later.

https://bugzilla.gnome.org/show_bug.cgi?id=743229

jadahl/gtk,jadahl/gtk,grubersjoe/adwaita,chergert/gtk,chergert/gtk,Adamovskiy/gtk,ahodesuka/gtk,Adamovskiy/gtk,alexlarsson/gtk,chergert/gtk,alexlarsson/gtk,jigpu/gtk,jadahl/gtk,Adamovskiy/gtk,Lyude/gtk-,chergert/gtk,grubersjoe/adwaita,jigpu/gtk,jigpu/gtk,ahodesuka/gtk,jigpu/gtk,grubersjoe/adwaita,Adamovskiy/gtk,ahodesuka/gtk,ahodesuka/gtk,jadahl/gtk,davidgumberg/gtk,grubersjoe/adwaita,Lyude/gtk-,alexlarsson/gtk,Lyude/gtk-,jigpu/gtk,jadahl/gtk,Adamovskiy/gtk,alexlarsson/gtk,davidgumberg/gtk,jigpu/gtk,chergert/gtk,ahodesuka/gtk,grubersjoe/adwaita,Adamovskiy/gtk,alexlarsson/gtk,jigpu/gtk,Lyude/gtk-,davidgumberg/gtk,Adamovskiy/gtk,davidgumberg/gtk,Lyude/gtk-,jadahl/gtk,Adamovskiy/gtk,chergert/gtk,davidgumberg/gtk,jigpu/gtk,ahodesuka/gtk,alexlarsson/gtk,grubersjoe/adwaita,grubersjoe/adwaita,jadahl/gtk,davidgumberg/gtk,chergert/gtk,davidgumberg/gtk,ahodesuka/gtk,alexlarsson/gtk,ahodesuka/gtk,jadahl/gtk,alexlarsson/gtk,davidgumberg/gtk,grubersjoe/adwaita,Lyude/gtk-,Lyude/gtk-,chergert/gtk,Lyude/gtk-