IVJ exception was not nested as it should be.

Reported by Chris Kreussling <chris.kreussling@ny.frb.org>
I'm committing blindly since I don't have stubs for VAJ


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@269924 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/optional/ide/VAJLocalUtil.java

@@ -54,12 +54,10 @@
 
 package org.apache.tools.ant.taskdefs.optional.ide;
 
-
 import java.util.Vector;
 import java.util.Enumeration;
 import java.io.File;
 
-
 import com.ibm.ivj.util.base.Package;
 import com.ibm.ivj.util.base.IvjException;
 import com.ibm.ivj.util.base.Workspace;
@@ -100,7 +98,7 @@ abstract class VAJLocalUtil implements VAJUtil{
                 errMsg = errMsg + "\n" + errors[i];
             }
         }
-        return new BuildException(errMsg);
+        return new BuildException(errMsg, e);
     }
 		
     /**