Fix Ubuntu 12.04 codename (precise, not trusty)
Fix Ubuntu 12.04 codename (precise, not trusty)

assem-ch/snowball,goodotcom/snowball,JDemler/snowball,goodotcom/snowball,cesarsouza/snowball,kariminf/snowball,snowballstem/snowball,xjzhou/snowball,xjzhou/snowball,snowballstem/snowball,JDemler/snowball,snowballstem/snowball,kariminf/snowball,assem-ch/snowball,kariminf/snowball,snowballstem/snowball,cesarsouza/snowball,cesarsouza/snowball,snowballstem/snowball,assem-ch/snowball,cesarsouza/snowball,JDemler/snowball,kariminf/snowball,kariminf/snowball,goodotcom/snowball,cesarsouza/snowball,snowballstem/snowball,goodotcom/snowball,snowballstem/snowball,xjzhou/snowball,xjzhou/snowball,xjzhou/snowball,assem-ch/snowball,JDemler/snowball,JDemler/snowball,assem-ch/snowball,cesarsouza/snowball,snowballstem/snowball,cesarsouza/snowball,JDemler/snowball