8315644: increase timeout of sun/security/tools/jarsigner/Warning.java

Reviewed-by: clanger, lucy

Author: MBaesken

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

@@ -36,7 +36,7 @@
  * @summary warnings, errors and -strict
  * @library /lib/testlibrary /test/lib
  * @build jdk.test.lib.util.JarUtils
- * @run main Warning
+ * @run main/othervm/timeout=400 Warning
  */
 public class Warning {