binding: Add a closure-based variant of bind_property_full()

Since using the function pointer version muddles the memory management
requirements of language bindings, we should implement a GClosure-based
variant on top of g_object_bind_property_full().

https://bugzilla.gnome.org/show_bug.cgi?id=622278

gobject/gobject.symbols

@@ -21,6 +21,7 @@ g_binding_get_source_property
 g_binding_get_target_property
 g_object_bind_property
 g_object_bind_property_full
+g_object_bind_property_with_closures
 #endif
 #endif