After packaging, remove staging and build directories used by rpmbuild
After packaging, remove staging and build directories used by rpmbuild

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