'ant debug' target to launch jswat debug session

jswat_ant.xml

<target name="debug" depends="build">

        <property name="cp" refid="project.classpath"/>

        <exec executable="jswat">
            <arg value="-J-Djswat.classpath=${cp}"/>
            <arg value="-J-Djswat.sourcepath='${src.dir}'"/>
            <arg value="-J-Djswat.launch=${main-class}"/>
            <arg line="-J-Djswat.jvmopts='${cmd.line.arg.config} ${cmd.line.arg.logging}'"/>
        </exec>
</target>