hg: jdk9/sandbox/jdk: 8158253: Collections: Implement a noop clear() for EmptyList, EmptyMap and EmptySet

[chris.hegarty at oracle.com]

Changeset: 6e55599ce242
Author:    psandoz
Date:      2016-05-28 13:57 +0530
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/6e55599ce242

8158253: Collections: Implement a noop clear() for EmptyList, EmptyMap and EmptySet
Reviewed-by: psandoz
Contributed-by: Mohamed Naufal <naufal11 at gmail.com>

! src/java.base/share/classes/java/util/Collections.java