adding debug message since the BuildException may be caught

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@276872 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Exit.java

@@ -136,6 +136,7 @@ public class Exit extends Task {
                     }
                 }
             }
+            log("failing due to " + text, getProject().MSG_DEBUG);
             throw ((status == null) ? new BuildException(text)
              : new ExitStatusException(text, status.intValue()));
         }