Add copyright statements.

Reconstruction/PFlow/PFlowUtils/src/CombinePFO.cxx

+/*
+  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+*/
+
 #include "CombinePFO.h"
 #include "AthContainers/ConstDataVector.h"
 #include "xAODCore/ShallowCopy.h"

Reconstruction/PFlow/PFlowUtils/src/CombinePFO.h

+/*                                                                                                                                                                                                                                           
+  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration                                                                                                                                                                    
+*/
+
 #ifndef COMBINEPFO_H
 #define COMBINEPFO_H