travis: Invoke distcheck to make sure all needed files are packaged
travis: Invoke distcheck to make sure all needed files are packaged

LudovicRousseau/OpenSC,philipWendland/OpenSC,fabled/OpenSC,philipWendland/OpenSC,OpenSC/OpenSC,dengert/OpenSC,philipWendland/OpenSC,OpenSC/OpenSC,LudovicRousseau/OpenSC,metsma/OpenSC,frankmorgner/OpenSC,frankmorgner/OpenSC,dengert/OpenSC,metsma/OpenSC,LudovicRousseau/OpenSC,metsma/OpenSC,mouse07410/OpenSC,dengert/OpenSC,OpenSC/OpenSC,frankmorgner/OpenSC,fabled/OpenSC,frankmorgner/OpenSC,mouse07410/OpenSC,mouse07410/OpenSC,fabled/OpenSC,fabled/OpenSC