Add local account support to make.conf.user
Add local account support to make.conf.user

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/660326

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