message: Added He3 ESD class to Linkdef file
diff: #pragma link C++ class AliLightNTrackMCHist+;
  #pragma link C++ class AliAnalysisTaskAntipd+;
  #pragma link C++ class AliAnalysisTaskHe3+;
  +#pragma link C++ class AliAnalysisTaskHe3_ESD+;
  /// * DeltaMasses
  #pragma link C++ class AliAnalysisNucleiMass+;
  #pragma link C++ class AliAnalysisNuclMult+;
  