make install-ant a little more robust
make install-ant a little more robust

git-svn-id: bddd0b838a5b7898c5897d85c562f956f46262e5@676094 13f79535-47bb-0310-9956-ffa450edef68

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