RFR (S) 8185296: java_lang_Class::array_klass should be array_klass_acquire

[Kim Barrett]

> On Jul 25, 2017, at 1:51 PM, coleen.phillimore at oracle.com wrote:
> 
> For consistency with https://bugs.openjdk.java.net/browse/JDK-8185296 should have made array_klass use load_acquire.
> 
> open webrev at http://cr.openjdk.java.net/~coleenp/8185296.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8185296

Looks good.