message: efficiency for legendre coef
diff: #pragma link C++ class AliAnalysisFBMultFluct+;
  #pragma link C++ class AliAnalysisTaskLongFluctuations+;
  #pragma link C++ class AliAnalysisTaskLegendreCoef+;
  +#pragma link C++ class AliAnalysisTaskLegendreCoef_local+;
  #pragma link C++ class AliAnalysisTaskEtaDist+;
  