making sure that the plugin target deletes the plugin dir

git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1686 b35dd754-fafc-0310-a699-88a17e54d16e

build/build.xml

@@ -853,6 +853,10 @@
 
     </target>
     <target name="plugin" description="build one plugin">
+        <delete dir="${plugin.dev.dest.dir}/${plugin}"/>
+        <delete file="${plugin.dev.dest.dir}/${plugin}.jar"/>
+        <delete dir="${plugin.dest.dir}/${plugin}"/>
+        <delete file="${plugin.dest.dir}/${plugin}.jar"/>
         <buildplugin plugin="${plugin}" pluginsrc="${plugin.src.dir}"/>
     </target>