Upgrade some dependencies to later releases 
          - diff-lcs (1.2.4)
          - builder (3.2.2)
          - net-ssh (2.6.7)
          - net-sftp (2.1.2)

git-svn-id: https://svn.apache.org/repos/asf/buildr/trunk@1491316 13f79535-47bb-0310-9956-ffa450edef68