hg: jdk/client: 8211810: X11 Time stamp data should be unsigned

[sergey.bylokhov at oracle.com]

Changeset: edc729e2ee36
Author:    itakiguchi
Date:      2018-10-30 15:51 -0700
URL:       http://hg.openjdk.java.net/jdk/client/rev/edc729e2ee36

8211810: X11 Time stamp data should be unsigned
Reviewed-by: serb

! src/java.desktop/unix/classes/sun/awt/X11/XDnDDropTargetProtocol.java
! src/java.desktop/unix/classes/sun/awt/X11/XMSelection.java