ec2: bump ami
ec2: bump ami

hkjn/docs-1,mischief/coreos-docs,endocode/coreos-docs,skynet/docs,coreos/docs,jonboulle/docs,bq-xiao/docs,joshix/docs,jdloft/docs,michelleN/docs,iankronquist/docs,marineam/coreos-docs,robszumski/docs,ksmaheshkumar/docs-2,atxwebs/docs,mjg59/docs,wli6/docs,ionave/docs