Remove (annoying) warning about VScaladoc when using Scala 2.8+ (take 2)

git-svn-id: https://svn.apache.org/repos/asf/buildr/trunk@1459983 13f79535-47bb-0310-9956-ffa450edef68
BUILDR-662 reported time is much shorter than actual

git-svn-id: https://svn.apache.org/repos/asf/buildr/trunk@1459984 13f79535-47bb-0310-9956-ffa450edef68