Going back to Ant 1.6.5 to fix the problem reported in

http://www.nabble.com/Hudson-not-building-with-mvn-clean-install-td19069287.html
Also see http://jira.codehaus.org/browse/MANTRUN-68


git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@11643 71c3de6d-444a-0410-be80-ed276b4c234a