gio: add support for g_auto() and g_autoptr()

Add support to libgio types for the new cleanup macros.

https://bugzilla.gnome.org/show_bug.cgi?id=743640

gio/gunixsocketaddress.h

@@ -37,6 +37,8 @@ typedef struct _GUnixSocketAddress        GUnixSocketAddress;
 typedef struct _GUnixSocketAddressClass   GUnixSocketAddressClass;
 typedef struct _GUnixSocketAddressPrivate GUnixSocketAddressPrivate;
 
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(GUnixSocketAddress, g_object_unref)
+
 struct _GUnixSocketAddress
 {
   GSocketAddress parent_instance;