Delete temporary work directory

git-svn-id: https://svn.apache.org/repos/asf/jakarta/bsf/trunk@798484 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/bsf3/bsf-engines/build.xml b/bsf3/bsf-engines/build.xml
index 4351e6f..ef9d4c8 100644
--- a/bsf3/bsf-engines/build.xml
+++ b/bsf3/bsf-engines/build.xml
@@ -84,6 +84,9 @@
         <!-- Now zip all that up into a single jar -->
 
         <zip destfile="${basedir}/target/bsf-engines.tmp.jar" basedir="${merged.engines.dir}" />
+    	
+    	<!-- Delete work directory -->
+        <delete dir="${merged.engines.dir}" />
 
         <!-- Use Retroweaver to convert all the classes to JDK 1.4 -->