RFR: 8249944: Move and improve the AllStatic class

[Kim Barrett]

> On Jul 23, 2020, at 3:36 AM, Thomas Stüfe <thomas.stuefe at gmail.com> wrote:
> 
> Hi Kim,
> 
> this is great. It allows for many subsequent removals of allocation.hpp.

Thanks.  That’s the idea.

> When should we use AllStatic, when real C++ namespaces?

That’s discussed in the new improved HotSpot Style Guide (JDK-8247976).

> Patch looks good to me.

Thanks.