RFR(M): 8033552: Fix missing missing volatile specifiers in CAS operations in GC code

[Thomas Schatzl]

Hi Erik,

On Tue, 2016-09-13 at 17:28 +0200, Erik Österlund wrote:
> Hi Kim,
> 
> New webrev with your proposed changes:
> http://cr.openjdk.java.net/~eosterlund/8033552/webrev.05/

  ship it.

Thomas