Add missing stack setup in Travis
Add missing stack setup in Travis

sinelaw/stack,meiersi-11ce/stack,lukexi/stack,hesselink/stack,MichielDerhaeg/stack,markus1189/stack,keent/stack,rubik/stack,mathhun/stack,CRogers/stack,fizruk/stack,chadbrewbaker/stack,DanielG/stack,GaloisInc/stack,bixuanzju/stack,akhileshs/stack,chadbrewbaker/stack,wskplho/stack,chreekat/stack,martin-kolinek/stack,narrative/stack,tedkornish/stack,agrafix/stack,soenkehahn/stack,AndrewRademacher/stack,rubik/stack,Denommus/stack,kairuku/stack,sjakobi/stack,tedkornish/stack,mrkkrp/stack,mrkkrp/stack,k-bx/stack,Blaisorblade/stack,wskplho/stack,mathhun/stack,rvion/stack,rrnewton/stack,MaxGabriel/stack,Blaisorblade/stack,AndreasPK/stack,cocreature/stack,kairuku/stack,cocreature/stack,athanclark/stack,soenkehahn/stack,achernyak/stack,vigoo/stack,supermario/stack,deech/stack,deech/stack,DanielG/stack,lukexi/stack,cabrera/stack,cabrera/stack,Denommus/stack,vigoo/stack,rekka/stack,keent/stack,bollu/stack,adinapoli/stack,Fuuzetsu/stack,ant1441/stack,fizruk/stack,rrnewton/stack,adinapoli/stack,anton-dessiatov/stack,supermario/stack,harendra-kumar/stack,robstewart57/stack,wolftune/stack,sinelaw/stack,GaloisInc/stack,duplode/stack,athanclark/stack,k-bx/stack,Fuuzetsu/stack,CRogers/stack,Heather/stack,AndreasPK/stack,duplode/stack,MaxGabriel/stack,Andrew-the-Ubergeek/stack,martin-kolinek/stack,juhp/stack,phadej/stack,wolftune/stack,rekka/stack,AndrewRademacher/stack,Heather/stack,rvion/stack,luigy/stack,narrative/stack,akhileshs/stack,luigy/stack,harendra-kumar/stack,joozek78/stack,juhp/stack,joozek78/stack,markus1189/stack,Andrew-the-Ubergeek/stack,bollu/stack,sjakobi/stack,bixuanzju/stack,achernyak/stack,meiersi-11ce/stack,ant1441/stack,chreekat/stack,anton-dessiatov/stack,robstewart57/stack,phadej/stack,MichielDerhaeg/stack,agrafix/stack