Add a javassist-src.jar to build a source artifact

git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@355 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

build.xml

 
   <property environment="env"/>
   <property name="target.jar" value="javassist.jar"/>
+  <property name="target-src.jar" value="javassist-src.jar"/>
   <property name="src.dir" value="${basedir}/src/main"/>
   <property name="build.dir" value="${basedir}/build"/>
   <property name="build.classes.dir" value="${build.dir}/classes"/>
       	  <include name="**/*.class"/>
       </fileset>
      </jar>
+    <jar jarfile="${target-src.jar}" manifest="${src.dir}/META-INF/MANIFEST.MF">
+      <fileset dir="${src.dir}">
+        <include name="javassist/**"/>
+      </fileset>
+    </jar>
   </target>
 
   <target name="javadocs">