RFR (XS): 8220345: Use appropriate type for G1RemSetScanState::IsDirtyRegionState

[Kim Barrett]

> On Mar 11, 2019, at 12:08 PM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> http://cr.openjdk.java.net/~tschatzl/8220345/webrev.0_to_1/ (diff)
> http://cr.openjdk.java.net/~tschatzl/8220345/webrev.1/ (full)
> 
> Thanks,
>  Thomas

Looks good.