8177474: Do not emit warnings when illegal access is allowed by --add-exports/--add-opens

[Mandy Chung]

> On Mar 23, 2017, at 12:16 PM, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> 
> I'd like to get jdk9/dev updated to align with the latest proposal for --add-exports/--add-opens to not emit warnings. I've put the webrev with the changes here:
> 
>    http://cr.openjdk.java.net/~alanb/8177474/webrev/index.html

Looks good to me.

Mandy