cbuildbot: fix typo
cbuildbot: fix typo

BUG=5937
TEST=none

Change-Id: I5b4a79fff4f3d263812e1dd0392e21ec3bede69d

Review URL: http://codereview.chromium.org/3175030

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