Diagnosis of XMLResultAggregatorTest.testFrames failure on Java 7.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1453122 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/optional/TraXLiaison.java

@@ -528,7 +528,7 @@ public class TraXLiaison implements XSLTLiaison3, ErrorListener, XSLTLoggerAware
      */
     public void fatalError(TransformerException e) {
         logError(e, "Fatal Error");
-        throw new BuildException("Fatal error during transformation", e);
+        throw new BuildException("Fatal error during transformation using " + stylesheet, e);
     }
 
     /**