7048308: 4/4 LoggingDeadlock3 test timeout is too small

Summary: Change timeout for test from 15 seconds to 80 seconds.
Reviewed-by: dholmes

test/java/util/logging/LoggingDeadlock3.java

@@ -27,7 +27,7 @@
  * @summary Calling LogManager.addLogger() and Logger.getLogger() cause deadlock
  * @author  Serguei Spitsyn
  * @build LoggingDeadlock3
- * @run main/timeout=15 LoggingDeadlock3
+ * @run main/timeout=80 LoggingDeadlock3
  */
 
 import java.io.*;