Make sure the example works

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272289 13f79535-47bb-0310-9956-ffa450edef68

proposal/myrmidon/src/java/org/apache/antlib/extensions/JarLibManifestTask.java

@@ -126,7 +126,7 @@ public final class JarLibManifestTask
      *
      * @param extensionSet a set of extensions that this library optionally requires.
      */
-    public void addOption( final ExtensionSet extensionSet )
+    public void addOptions( final ExtensionSet extensionSet )
     {
         m_optionals.add( extensionSet );
     }

proposal/myrmidon/src/samples/sample.ant

@@ -339,9 +339,9 @@ Legal:
     <target name="manifest-test">
 
         <extension-set id="my-dependencies">
-            <dependsfileset dir="../../">
+            <libfileset dir="../../">
                 <include name="src/ant1compat/jar/*.jar"/>
-            </dependsfileset>
+            </libfileset>
             <extension
                 extension-name="MrMadeUpExtension"
                 specification-version="1.0"
@@ -349,9 +349,9 @@ Legal:
         </extension-set>
 
         <extension-set id="my-options">
-            <dependsfileset dir="../../">
+            <libfileset dir="../../">
                 <include name="lib/*.jar"/>
-            </dependsfileset>
+            </libfileset>
         </extension-set>
 
         <extension id="my-extension"