RFR(S): 8245011: Add JFR event for cold methods flushed

[Erik Gahlin]

Looks good.

Erik

> On 14 May 2020, at 22:06, Nils Eliasson <nils.eliasson at oracle.com> wrote:
> 
> Hi,
> 
> Please review this small patch that adds a JFR event for cold methods that are flushed and adds the total number of cold methods flushed to the sweeper statistics event.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8245011
> Webrev: http://cr.openjdk.java.net/~neliasso/8245011/
> 
> Please review,
> 
> Nils Eliasson