python: Improve support for python calling back to C++ member functions.

Add support for declaring SimObjects to swig so their members can be wrapped.
Make sim_object.i only contain declarations for SimObject.
Create system.i to contain declarations for System.
Update python code to properly call the C++ given the new changes.

--HG--
extra : convert_revision : 82076ee69e8122d56e91b92d6767e356baae420a

src/python/m5/params.py

@@ -1025,13 +1025,13 @@ class PortRef(object):
 
     # Call C++ to create corresponding port connection between C++ objects
     def ccConnect(self):
-        import internal
+        from m5.objects.params import connectPorts
 
         if self.ccConnected: # already done this
             return
         peer = self.peer
-        internal.sim_object.connectPorts(self.simobj.getCCObject(), self.name,
-            self.index, peer.simobj.getCCObject(), peer.name, peer.index)
+        connectPorts(self.simobj.getCCObject(), self.name, self.index,
+                     peer.simobj.getCCObject(), peer.name, peer.index)
         self.ccConnected = True
         peer.ccConnected = True