Added support to _not_ compile the VisualAge for Java

IDE integration classes unless the Workspace class
is in the classpath.


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268160 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -71,6 +71,7 @@
     <available property="ftp.present" classname="com.oroinc.net.ftp.FTPClient" />
     <available property="starteam.present" classname="com.starbase.util.Platform" />
     <available property="antlr.present" classname="antlr.Tool" />
+    <available property="vaj.present" classname="com.ibm.ivj.util.base.Workspace" />
   </target>
 
   <!-- =================================================================== -->
@@ -108,6 +109,7 @@
       <exclude name="**/FTP*.java" unless="ftp.present" />
       <exclude name="**/AntStarTeam*.java" unless="starteam.present" />
       <exclude name="**/ANTLR.java" unless="antlr.present" />
+      <exclude name="**/ide/VAJ*.java" unless="vaj.present" />
     </javac>
  
     <copy todir="${build.classes}">