RFR: 8214782: Add missing access barriers on CLD handle area

[coleen.phillimore at oracle.com]

Looks good.
Coleen

On 12/4/18 7:48 AM, Per Liden wrote:
> The CLD handle area contains raw oops. Those oops should be 
> manipulated using NativeAccess barriers. Two such barriers are 
> currently missing.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8214782
> Webrev: http://cr.openjdk.java.net/~pliden/8214782/webrev.0
>
> /Per