libgtk3: mark wayland support as broken

As discussed on the list it requires a matching XDG runtime API level
which is currently not the case (wayland/weston newer than libgtk3 at
the moment). It doesn't normall exhibit build failures, but it fails at
runtime regardless.

Also fixes:
http://autobuild.buildroot.net/results/aae/aae4266c16189b295cc7ceb60000c504ebb60752/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libgtk3/Config.in

@@ -40,6 +40,8 @@ config BR2_PACKAGE_LIBGTK3_X11
 config BR2_PACKAGE_LIBGTK3_WAYLAND
 	bool "GDK Wayland backend"
 	default y
+	# Needs a libgtk3 bump to match API level
+	depends on BROKEN
 	depends on BR2_PACKAGE_WAYLAND
 	select BR2_PACKAGE_LIBXKBCOMMON
 	help