RFR [9] 8148117: Move sun.misc.Cleaner to jdk.internal.ref

[Mandy Chung]

> On Jan 26, 2016, at 8:27 AM, Chris Hegarty <chris.hegarty at oracle.com> wrote:
> 
> Latest webrev updated in-place:
>  http://cr.openjdk.java.net/~chegar/8148117/
> 
> * to execute the run method requires an appropriate permission
> * reverted any copyright changes ( leave to a bulk update )
> * updated the test to remove the script

Catching up on this review thread.

The patch looks good.  Having jdk.internal.ref.Cleaner to implement Runnable with the permission check looks reasonable.

Mandy