message: pi0 analysis in pp 8 TeV is added to LinkDef
diff: // ClusterSelection
  #pragma link C++ class AliPHOSTriggerUtils+;
  +// PHOS_pp_8TeV_2012
  +#pragma link C++ class AliCaloPhoton+;
  +#pragma link C++ class AliAnalysisTaskPHOSTrigPi0+;
  +#pragma link C++ class AliCaloTriggerSimulator+;
  +
  // PHOS_pp_pi0
  #pragma link C++ class AliCaloPhoton+;
  #pragma link C++ class AliAnalysisTaskPi0+;
  