Add event sources to jar

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1737227 13f79535-47bb-0310-9956-ffa450edef68

fop/build.xml

@@ -504,6 +504,9 @@ list of possible build targets.
       <fileset dir="${src.java.dir}">
         <patternset refid="java-only"/>
       </fileset>
+      <fileset dir="${events.src.java.dir}">
+        <patternset refid="java-only"/>
+      </fileset>
       <fileset dir="${basedir}">
         <include name="../LICENSE"/>
         <include name="../NOTICE"/>