hg: jdk9/sandbox/hotspot: Update the native unsafe compare and exchange methods to always

[paul.sandoz at oracle.com]

Changeset: ed88f2356d2b
Author:    psandoz
Date:      2015-11-02 16:41 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/hotspot/rev/ed88f2356d2b

Update the native unsafe compare and exchange methods to always
return the witness value.

! src/share/vm/prims/unsafe.cpp