Fix missing dictionary entry for o2::fv0::MCLabel

Author: sawenzel

DataFormats/Detectors/FIT/FV0/src/DataFormatsFV0LinkDef.h

@@ -18,6 +18,8 @@
 #pragma link C++ class o2::fv0::Hit + ;
 #pragma link C++ class vector < o2::fv0::Hit> + ;
 #pragma link C++ class o2::fv0::MCLabel + ;
+#include "SimulationDataFormat/MCTruthContainer.h"
+#pragma link C++ class o2::dataformats::MCTruthContainer < o2::fv0::MCLabel> + ;
 
 #pragma link C++ class o2::fv0::ChannelData + ;
 #pragma link C++ class o2::fv0::Digit + ;