remote: fix IPRoute groups for RemoteIPRoute

So the `RTNL_API.dump()` will work correctly

pyroute2/remote/iproute.py

@@ -130,6 +130,7 @@ def __init__(self, *argv, **kwarg):
             raise
         self.marshal = MarshalRtnl()
         self.target = target
+        self.groups = 67372509
 
     def clone(self):
         return type(self)(*self._argv, **self._kwarg)