RFR JDK-8066443: Add G1 support for promotion event

[Thomas Schatzl]

Hi Staffan,

On Wed, 2015-08-12 at 10:23 -0700, Staffan Friberg wrote:
> Hi,
> 
> This webrev adds support for the G1 collector and the promotion event 
> that collects statistics about the promoted object types.
> 
> Once reviewed I would need a sponsor to push the patch.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8066443
> Webrev: http://cr.openjdk.java.net/~sfriberg/JDK-8066443/webrev.01/
> 

  looks good to me. I can sponsor it if required.

Thanks,
  Thomas