8368982: Test sun/security/tools/jarsigner/EC.java completed and timed out

Reviewed-by: rhalade

Author: myankelev

test/jdk/sun/security/tools/jarsigner/EC.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2009, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,6 +26,7 @@
  * @bug 6870812
  * @summary enhance security tools to use ECC algorithm
  * @library /test/lib
+ * @run main/timeout=300 EC
  */
 
 import jdk.test.lib.SecurityTools;