Guys check your Automatic builds thread sometimes.

Aaight, from now on our buildbot shall not announce a duplicate revision no matter how drunk it is. I've added a constrain in the database to block duplicate revisions for the same emulator. However shadow should still look for a workarround to block builds that are already built. This is because the git client that we use sometimes gets confused about what is going on.. and then buildbot gets drunk. Go home buildbot!