Ensure the OpenJavaDocCheck plugins are compiled

Author: egonw

build.xml

@@ -303,6 +303,7 @@
               <param name="module" value="${module}"/>
           </antcall>
 
+          <ant antfile="javadoc.xml" target="compileDocTests"/>
           <ant antfile="javadoc.xml" target="ojdcheck-module">
               <property name="module" value="${module}"/>
           </ant>

javadoc.xml

@@ -241,6 +241,7 @@
       <classpath>
         <fileset dir="develjar/">
           <include name="ojdcheck.jar" />
+          <include name="com-sun-*.jar" />
         </fileset>
       </classpath>
     </javac>