Build and Install the chromiumos-build tool in the chroot
Build and Install the chromiumos-build tool in the chroot

Review URL: http://codereview.chromium.org/491014

endocode/scripts,fivethreeo/scripts,smilart/scripts,zhang0137/scripts,sigma/coreos-scripts,bcwaldon/coreos-scripts,marineam/coreos-scripts,andrejro/coreos--scripts,glevand/coreos--scripts,andrejro/coreos--scripts,gtank/scripts,nicescale/scripts,gtank/scripts,glevand/coreos--scripts,marineam/coreos-scripts,coreos/scripts,crawford/scripts,sigma/coreos-scripts,marineam/coreos-scripts,crawford/scripts,BugRoger/scripts,mischief/scripts,mjg59/scripts,bcwaldon/coreos-scripts,trnubo/scripts,sigma/coreos-scripts,zhang0137/scripts,crawford/scripts,nicescale/scripts,endocode/scripts,bcwaldon/coreos-scripts,fivethreeo/scripts,nicescale/scripts,fivethreeo/scripts,trnubo/scripts,mjg59/scripts,mischief/scripts,trnubo/scripts,vmware/coreos-scripts,gtank/scripts,smilart/scripts,mjg59/scripts,zhang0137/scripts,BugRoger/scripts,BugRoger/scripts,mischief/scripts,andrejro/coreos--scripts,smilart/scripts,vmware/coreos-scripts,coreos/scripts,vmware/coreos-scripts,endocode/scripts