Move private extensions out of the lib, inside the shell.

shell/extensions/extensions.override

@@ -0,0 +1,19 @@
+/* -*- Mode: C; c-basic-offset: 4 -*- */
+%%
+headers
+#include <Python.h>
+
+#include "pygobject.h"
+#include "sugar-key-grabber.h"
+#include "sugar-address-entry.h"
+#include "sugar-audio-manager.h"
+
+%%
+modulename extensions
+%%
+import gobject.GObject as PyGObject_Type
+import gtk.Entry as PyGtkEntry_Type
+%%
+ignore-glob
+  *_get_type
+  _*