Fix ant jar: remove duplicate classes and old tools.

Signed-off-by: Eric Chen <taiyang.chen@gmail.com> (github: taiyangc)

build.xml

@@ -58,9 +58,9 @@
		</javac>
	</target>

	<target name="jar" depends="build,tools" description="Jar the files">
	<target name="jar" depends="build" description="Jar the files">
		<mkdir dir="${buildlib}" />
		<jar destfile="${buildlib}/jmdns.jar" manifest="${lib}/jmdns.manifest" basedir="${dest}">
		<jar destfile="${buildlib}/jmdns.jar" manifest="${lib}/jmdns.manifest">
			<fileset dir="${dest}" defaultexcludes="yes">
				<include name="**/*.class" />
				<exclude name="**/test/*.class" />