add contributors files and patch.xml to source tarballs

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1592316 13f79535-47bb-0310-9956-ffa450edef68
zap tabs

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1592317 13f79535-47bb-0310-9956-ffa450edef68
add contributors files and patch.xml to binary tarballs as well

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1592318 13f79535-47bb-0310-9956-ffa450edef68