Fix bug with git packages with no matching ebuild.
Fix bug with git packages with no matching ebuild.

Change-Id: I45454c837807fbe6e5996b76087bbfe25d7155ce

Review URL: http://codereview.chromium.org/3171032

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