bindings: Rescan of python bindings

Refs #1005 (http://redmine.named-data.net/)
diff --git a/wscript b/wscript
index 6fac829..03ba951 100644
--- a/wscript
+++ b/wscript
@@ -183,7 +183,7 @@
 
     bld.recurse ('tools')
 
-    # bld.ns3_python_bindings()
+    bld.ns3_python_bindings()
 
 
 @TaskGen.feature('ns3fullmoduleheaders')