RFR: 8286775: Remove identical per-compiler definitions of unsigned integral jtypes

[David Holmes]

On Mon, 23 Jan 2023 07:42:29 GMT, David Holmes <dholmes at openjdk.org> wrote:

> Trivial update to share the common typedef's.
> 
> Testing: 
>   - Oracle tier 1 - 5 builds
>   - GHA (TBD)
> 
> Thanks.

It is not obvious to me that either `using` or `std::make_unsigned` are permitted to be used under current hotspot style guidelines ??

What is the advantage/difference between `using` and `typedef`?

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PR: https://git.openjdk.org/jdk/pull/12136