travis-ci: Add clang linux target
travis-ci: Add clang linux target

philipWendland/OpenSC,hongquan/OpenSC-main,metsma/OpenSC,hongquan/OpenSC-main,frankmorgner/OpenSC,AktivCo/OpenSC,dengert/OpenSC,frankmorgner/OpenSC,OpenSC/OpenSC,philipWendland/OpenSC,frankmorgner/OpenSC,mouse07410/OpenSC,fabled/OpenSC,fabled/OpenSC,fabled/OpenSC,mouse07410/OpenSC,Jakuje/OpenSC,OpenSC/OpenSC,hongquan/OpenSC-main,Jakuje/OpenSC,OpenSC/OpenSC,rickyepoderi/OpenSC,Jakuje/OpenSC,dengert/OpenSC,AktivCo/OpenSC,dengert/OpenSC,LudovicRousseau/OpenSC,LudovicRousseau/OpenSC,AktivCo/OpenSC,LudovicRousseau/OpenSC,mouse07410/OpenSC,fabled/OpenSC,metsma/OpenSC,philipWendland/OpenSC,metsma/OpenSC,frankmorgner/OpenSC,rickyepoderi/OpenSC,rickyepoderi/OpenSC,Jakuje/OpenSC