Add a link to selectors from isfileselected.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@277790 13f79535-47bb-0310-9956-ffa450edef68

docs/manual/CoreTasks/conditions.html

@@ -368,7 +368,8 @@ that is "true","yes", or "on"</p>
   </table>
   <h4>isfileselected</h4>
   <p>
-    Test whether a file passes an embedded selector.
+    Test whether a file passes an embedded
+    <a href="../CoreTypes/selectors.html">selector</a>.
   </p>
   <p>
     This condition was added in Apache Ant 1.6.3.