rkt/run: clarify location of default stage1
rkt/run: clarify location of default stage1

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