Update CHROMEOS_VERSION_MINOR=7, Post R6.
Update CHROMEOS_VERSION_MINOR=7, Post R6.

Review URL: http://codereview.chromium.org/1645002

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