make buildnumber task more configurable
make buildnumber task more configurable

git-svn-id: 29f0868cb983d9404d09bb30d964f948aae571fc@484516 13f79535-47bb-0310-9956-ffa450edef68

apache/ant-ivy,twogee/ant-ivy,twogee/ant-ivy,twogee/ant-ivy,apache/ant-ivy,thelateperseus/ant-ivy,jaikiran/ant-ivy,sbt/ivy,jaikiran/ant-ivy,apache/ant-ivy,apache/ant-ivy,thelateperseus/ant-ivy,sbt/ivy,twogee/ant-ivy,jaikiran/ant-ivy,jaikiran/ant-ivy