stage1: fix rootfs reference
stage1: fix rootfs reference

bramvdbogaerde/rocket-arm,kinvolk/rkt,lsm5/rkt,mike1729/rkt,bsmr-go/rkt,linki/rkt,il9ue/rkt,kinvolk/rkt,euank/rkt,crawford/rkt,tv42/rkt,kbrwn/rkt,Wilybald/rkt,alban/rkt,jzelinskie/rkt,intfrr/rkt,ChengTiesheng/rkt,liugenping/rkt,tmrts/rkt,michelangelo13/rkt,clearlinux/rkt,sstabellini/rkt,krnowak/rkt,rkt/rkt,Wilybald/rkt,squeed/rkt,iankronquist/rkt,dalanlan/rkt,wparad/rkt,mike1729/rkt,rhvgoyal/rkt,yifan-gu/rocket,lsm5/rkt,chrisseto/rkt,Shashwatsh/rkt,MabinGo/rkt,marineam/rkt,jakon89/rkt,tv42/rkt,joshix/rkt,dalanlan/rkt,joshix/rkt,lucasallan/rkt,philips/rkt,liugenping/rkt,nhlfr/rkt,blixtra/rkt,chrisseto/rkt,jonboulle/rkt,mike1729/rkt,kinvolk/rkt,eyakubovich/rkt,liugenping/rkt,squaremo/rkt,Yhgenomics/rkt,cab105/rkt,kbrwn/rkt,s-urbaniak/rkt,rot26/rkt,shobhit85/rkt,lucasallan/rkt,krnowak/rkt,wparad/rkt,Shashwatsh/rkt,dgonyeo/rkt,MattDees/rkt,s-urbaniak/rkt,akshaykarle/rkt,il9ue/rkt,bsmr-go/rkt,rkt/rkt,lee212/rkt,ybubnov/rkt,Shashwatsh/rkt,alexhersh/rkt,xnox/rkt,eyakubovich/rkt,marineam/rkt,wparad/rkt,yifan-gu/rkt,klizhentas/rkt,yifan-gu/rocket,jjlakis/rkt,MabinGo/rkt,eyakubovich/rkt,ramitsurana/rkt,MabinGo/rkt,squaremo/rkt,dgonyeo/rkt,ramitsurana/rkt,gdi2290/rocket,euank/rkt,rhvgoyal/rkt,michelangelo13/rkt,shtouff/rkt,sinfomicien/rkt,mattthias/pkg-rkt,iaguis/rkt,jzelinskie/rkt,jonboulle/rkt,matthaias/rkt,intelsdi-x/rkt,Wilybald/rkt,dgonyeo/rkt,jiachenning/rocket,liubq919/rkt,lee212/rkt,sgotti/rkt,kinvolk/rkt,joshix/rkt,squeed/rkt,alexhersh/rkt,jakon89/rkt,sgotti/rkt,ramitsurana05/rkt,gdi2290/rocket,lsm5/rkt,fdserr/rkt,MattDees/rkt,sinfomicien/rkt,crawford/rkt,lee212/rkt,jasonchaffee/rkt,MattDees/rkt,nhlfr/rkt,markllama/rkt,blixtra/rkt,matthaias/rkt,shobhit85/rkt,sstabellini/rkt,Wilybald/rkt,euank/rkt,klizhentas/rkt,matthaias/rkt,tixxdz/rkt,s-urbaniak/rkt,jasonchaffee/rkt,jakon89/rkt,sgotti/rkt,alban/rkt,jjlakis/rkt,robszumski/rocket,dalanlan/rkt,monstermunchkin/rkt,marineam/rkt,intfrr/rkt,mjg59/rkt,maquanyi/rkt,achanda/rkt,sstabellini/rkt,luebken/rkt,mjg59/rkt,ramitsurana/rkt,akshaykarle/rkt,alban/rkt,tmrts/rkt,coreos/rkt,alexhersh/rkt,bramvdbogaerde/rocket-arm,luebken/rkt,squaremo/rkt,fdserr/rkt,Yhgenomics/rkt,iaguis/rkt,joshix/rkt,luebken/rkt,shtouff/rkt,achanda/rkt,ChengTiesheng/rkt,lucasallan/rkt,monstermunchkin/rkt,smarvin/rkt,linki/rkt,sinfomicien/rkt,mattthias/pkg-rkt,xnox/rkt,tixxdz/rkt,tmrts/rkt,michelangelo13/rkt,cab105/rkt,maquanyi/rkt,ybubnov/rkt,ramitsurana05/rkt,markllama/rkt,adfernandes/rkt,mjg59/rkt,yifan-gu/rkt,ChengTiesheng/rkt,linki/rkt,yifan-gu/rkt,krnowak/rkt,tixxdz/rkt,monstermunchkin/rkt,philips/rkt,mattthias/pkg-rkt,akshaykarle/rkt,coreos/rkt,il9ue/rkt,crawford/rkt,cab105/rkt,smarvin/rkt,liubq919/rkt,lucasallan/rkt,jasonchaffee/rkt,iaguis/rkt,intelsdi-x/rkt,rhvgoyal/rkt,intfrr/rkt,rot26/rkt,shtouff/rkt,endocode/rkt,Yhgenomics/rkt,tv42/rkt,jjlakis/rkt,jzelinskie/rkt,bsmr-go/rkt,kbrwn/rkt,jonboulle/rkt,achanda/rkt,rkt/rkt,endocode/rkt,adfernandes/rkt,chrisseto/rkt,coreos/rkt,iankronquist/rkt,squeed/rkt,nhlfr/rkt,robszumski/rocket,iankronquist/rkt,shobhit85/rkt,maquanyi/rkt,ybubnov/rkt,robszumski/rocket,smarvin/rkt,liubq919/rkt,endocode/rkt,rkt/rkt,ramitsurana05/rkt,intelsdi-x/rkt,clearlinux/rkt,yifan-gu/rocket,clearlinux/rkt,blixtra/rkt,jiachenning/rocket,xnox/rkt,markllama/rkt,klizhentas/rkt,fdserr/rkt,rot26/rkt,adfernandes/rkt