hg: jdk9/client/jdk: 7096375: Swing ignores first click after decreasing system's time

[prasanta.sadhukhan at oracle.com]

Changeset: e7b77766b1ce
Author:    aghaisas
Date:      2016-07-22 12:13 +0530
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/e7b77766b1ce

7096375: Swing ignores first click after decreasing system's time
Reviewed-by: alexsch, rchamyal

! src/java.desktop/share/classes/javax/swing/plaf/basic/BasicButtonListener.java
+ test/javax/swing/JButton/TimeChangeButtonClickTest.java