hg: jdk8/tl/jdk: 4533691: Add Collections.emptySortedSet()

[mike.duigou at oracle.com]

Changeset: 2f2f56ac8b82
Author:    mduigou
Date:      2011-11-03 13:26 -0700
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/2f2f56ac8b82

4533691: Add Collections.emptySortedSet()
Reviewed-by: mduigou, alanb, dholmes
Contributed-by: darryl.mocek at oracle.com

! src/share/classes/java/util/Collections.java
+ test/java/util/Collections/EmptySortedSet.java