add script to mod dev install shim to create a dev recovery image
add script to mod dev install shim to create a dev recovery image

Change-Id: I1333cef94e5157206a464d9505de42707ead10a4

Review URL: http://codereview.chromium.org/3083007

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