Make sure we don't trigger deprecation warnings while compiling the python bindings.

bindings/python/wscript

@@ -348,6 +348,7 @@ def build(bld):
         pymod.target = 'ns3/_ns3'
         pymod.name = 'ns3module'
         pymod.uselib_local = "ns3"
+        pymod.env.append_value('CXXDEFINES', ['NS_DEPRECATED=""', 'NS3_DEPRECATED_H'])
 
         # copy the __init__.py file to the build dir waf can't handle
         # this, it's against waf's principles to have build dir files