Build: Compile resource bundles from ant, not msgfmt,

speeding up builds with translations by 20x

apps/susimail/build.xml

@@ -113,6 +113,11 @@
         <exec executable="sh" osfamily="windows" failifexecutionfails="false" >
             <arg value="./bundle-messages.sh" />
         </exec>
+        <javac source="${javac.version}" target="${javac.version}" 
+               includeAntRuntime="false"
+               srcdir="build/messages-src" destdir="src/WEB-INF/classes">
+            <compilerarg line="${javac.compilerargs}" />
+        </javac>
     </target>
 
     <target name="poupdate" depends="builddep, compile">