PIG-3186 tar/deb/pkg ant targets should depend on piggybank


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1468544 13f79535-47bb-0310-9956-ffa450edef68
PIG-3193: Fix "ant docs" warnings (cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1468559 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk