* fix typo in bat script

* fix build script poupdate target on windows
* change messages_nl.po's encoding to UTF-8 (desktopUI)
* add message_zh.po for desktopUI
- POs not translated yet, just updated

apps/desktopgui/build.xml

@@ -45,7 +45,11 @@
         <exec executable="sh" osfamily="mac" failifexecutionfails="true" >
             <arg value="./bundle-messages.sh" />
         </exec>
-
+        <exec executable="cmd" osfamily="windows" failifexecutionfails="true" >
+            <arg value="/c" />
+			<!-- no leading ./ here, windoz complains about it. -->
+            <arg value="bundle-messages.bat" />
+        </exec>
 		<jar basedir="${build}" destfile="${dist}/${jar}">
 			<manifest>
 				<attribute name="Main-Class" value="net.i2p.desktopgui.Main"/>
@@ -78,6 +82,12 @@
             <arg value="./bundle-messages.sh" />
             <arg value="-p" />
         </exec>
+        <exec executable="cmd" osfamily="windows" failifexecutionfails="true" >
+            <arg value="/c" />
+			<!-- no leading ./ here, windoz complains about it. -->
+            <arg value="bundle-messages.bat" />
+            <arg value="-p" />
+        </exec>
     </target>
 
 	<target name="dist" depends="jar" />