fix for successive builds

git-svn-id: svn+ssh://svn.internal.sanger.ac.uk/repos/svn/pathsoft/artemis/trunk@9836 ee4ac58c-ac51-4696-9907-e4b3aa274f04

build.xml

@@ -74,6 +74,7 @@
       <fileset dir="${src.dir}">
       	<exclude name="**/CVS/**" />
       	<exclude name="test/**" />
+      	<exclude name="ant-build/**" />
       </fileset>
     </copy>