RFC: Pick up 11.0.8+8 to sh/jdk11

[Roman Kennke]

Yup, go!

Roman

On Wed, 2020-06-24 at 09:28 +0200, Aleksey Shipilev wrote:
> 	Error verifying signature: Cannot verify message signature:
> Incorrect message format
> Upstream published 11.0.8+8, let's pick it up to sh/jdk11.
> 
> Merge is trivial. I would tag the result shenandoah-jdk-11.0.8+8
> immediately.
> 
> Testing: hotspot_gc_shenandoah {fastdebug,release}
>