hg: lambda/lambda/jdk: Move singleton ref spliterator into collections.

[paul.sandoz at oracle.com]

Changeset: 219abb4073e8
Author:    psandoz
Date:      2013-03-23 11:05 +0100
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/219abb4073e8

Move singleton ref spliterator into collections.
(Potentially revive as part of the public API later on.)

! src/share/classes/java/util/Collections.java
! src/share/classes/java/util/Spliterators.java
! test/java/util/Spliterator/SpliteratorTraversingAndSplittingTest.java