RFR: 8229135: ZGC: Adding missing ZStatTimerDisable before call to ZVerify::roots_strong()

[Stefan Karlsson]

Looks good.

StefanK

On 2019-08-05 15:47, Per Liden wrote:
> ZVerify::roots_strong() is called outside of a ZStatTimerDisable scope, 
> which means the root scanning stat counters/samplers will be polluted.
> 
> (This fix was originally part of JDK-8229017, but Stefan asked me to 
> break this out into a separate fix)
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8229135
> Webrev: http://cr.openjdk.java.net/~pliden/8229135/webrev.0
> 
> /Per