Fix raspbian builds.
Fix raspbian builds.

  * Use latest release rather than master.
  * Stage5 no longer exists.

mwutzke/faucet,mwutzke/faucet,anarkiwi/faucet,trungdtbk/faucet,shivarammysore/faucet,REANNZ/faucet,faucetsdn/faucet,REANNZ/faucet,trungdtbk/faucet,shivarammysore/faucet,anarkiwi/faucet,gizmoguy/faucet,gizmoguy/faucet,faucetsdn/faucet