[8] 2020-06-03, Bulk backports to sh/jdk8

[Zhengyu Gu]

Okay.

-Zhengyu

On 6/3/20 8:28 AM, Aleksey Shipilev wrote:
> https://cr.openjdk.java.net/~shade/shenandoah/backports/jdk8u-20200603/webrev.01/
> 
> This backports two bugfixes:
>    [backport] 8246162: Shenandoah: full GC does not mark code roots when class unloading is off
>    [backport] 8245757: Shenandoah: AlwaysPreTouch should not disable heap resizing or uncommits
> 
> Testing: hotspot_gc_shenandoah {fastdebug,release}
>