Add sourcefiles line to debug target.

git-svn-id: http://svn.codehaus.org/jruby/trunk/jruby@8159 961051c9-f516-0410-bf72-c9f7e237a7b7

Author: headius

Diff for: netbeans-ant.xml

@@ -86,6 +86,7 @@
         <pathelement path="${jruby.classes.dir}"/>
         <path refid="build.classpath"/>
       </classpath>      
+      <sourcepath path="${src.dir}"/>
     </nbjpdastart>
     <java classname="org.jruby.Main" maxmemory="${jruby.launch.memory}" fork="true">
       <classpath>