Added clean-all target

Author: poutsma

samples/airline/client/build.xml

@@ -1,6 +1,13 @@
 <?xml version="1.0"?>
 <project name="spring-ws-airline-sample-clients" default="run-all">
 
+    <target name="clean-all">
+        <ant dir="axis1" target="clean"/>
+        <ant dir="jax-ws" target="clean"/>
+        <ant dir="saaj" target="clean"/>
+        <ant dir="spring-ws" target="clean"/>
+    </target>
+
     <target name="run-all">
         <ant dir="axis1" target="run"/>
         <ant dir="jax-ws" target="run"/>