set taskname in signjar task

Submitted by:	Peter Donald <pjdonald@latcs2.cs.latrobe.EDU.AU>


git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@267780 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -210,6 +210,8 @@ public class SignJar extends Task {
         log("Signing Jar : " + (new File(jar)).getAbsolutePath());
         final Exec cmd = (Exec) project.createTask("exec");
         cmd.setCommand(sb.toString());
+        cmd.setFailonerror("true");
+        cmd.setTaskName( getTaskName() );
         cmd.execute();
     } 
 }