change AntlibInterface to AntlibDefintion

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@275278 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTypes/antlib.html

@@ -20,8 +20,8 @@
       Antlib's elements are ant definition tasks - like
       <a href="../CoreTasks/typedef.html">Typedef</a>
       and <a href="../CoreTasks/taskdef.html">Taskdef</a>,
-      or any ant task that implements
-      <code>org.apache.tools.ant.taskdefs.AntlibInterface</code>.
+      or any ant task that extends
+      <code>org.apache.tools.ant.taskdefs.AntlibDefinition</code>.
     </p>
     <p>
       A group of tasks and types may be defined together in an antlib