don't re-execute the build steps for no-source projects
don't re-execute the build steps for no-source projects

lvfeng1130/omnibus,szechyjs/omnibus,lvfeng1130/omnibus,jamesn/omnibus,3ofcoins/chef-omnibus,hugosato/omnibus,higanworks/omnibus,adamleff/omnibus,pskrz/omnibus,pskrz/omnibus,mattray/omnibus,higanworks/omnibus,pskrz/omnibus,servebox/omnibus,hugosato/omnibus,ashhher3/omnibus,chef/omnibus,intfrr/omnibus,ashhher3/omnibus,servebox/omnibus,strangelittlemonkey/omnibus,rhass/omnibus,chef/omnibus,intfrr/omnibus,ashhher3/omnibus,rapid7/omnibus,intfrr/omnibus,rapid7/omnibus,Altiscale/omnibus,mattray/omnibus,szechyjs/omnibus,hugosato/omnibus,szechyjs/omnibus,DataDog/omnibus-ruby,rhass/omnibus,3ofcoins/chef-omnibus,mattray/omnibus,strangelittlemonkey/omnibus,Altiscale/omnibus,DataDog/omnibus-ruby,rapid7/omnibus,sh9189/omnibus,Scalr/omnibus,DataDog/omnibus-ruby,higanworks/omnibus,Scalr/omnibus,rhass/omnibus,sh9189/omnibus,Altiscale/omnibus,jamesn/omnibus,sh9189/omnibus,lvfeng1130/omnibus,adamleff/omnibus,strangelittlemonkey/omnibus,adamleff/omnibus,Scalr/omnibus,servebox/omnibus,jamesn/omnibus,chef/omnibus,3ofcoins/chef-omnibus