Fix name of test image from autotest archive.
Fix name of test image from autotest archive.

Review URL: http://codereview.chromium.org/1711005

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