Add in a gsutil_append_latest bool option to avoid appending ChromeOS-Hash-B# to the output of images uploaded to Google Storage. This is a stop gap solution until I migrate all builders to uploading with the new structure.
Add in a gsutil_append_latest bool option to avoid appending ChromeOS-Hash-B#
to the output of images uploaded to Google Storage. This is a stop gap solution
until I migrate all builders to uploading with the new structure.

BUG=NA
TEST=Ran on a finished buildbot to ensure the proper behaviour

Review URL: http://codereview.chromium.org/6749018

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