RFR: 8304915: Create jdk.internal.util.Architecture enum and apply [v13]

[Martin Doerr]

On Wed, 12 Apr 2023 17:31:49 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Define an internal jdk.internal.util.Architecture enumeration and static methods to replace uses of the system property `os.arch`.
>> The enumeration values are defined to match those used in the build.
>> The initial values are: `X64, X86, AARCH64, RISCV64, S390, PPC64`
>> Note that `amd64` and `x86_64` in the build are represented by `X64`.
>> The value of the system property `os.arch` is unchanged.
>> 
>> The API is similar to the jdk.internal.util.OperatingSystem enum created by #[12931](https://git.openjdk.org/jdk/pull/12931).
>> Uses in `java.base` and a few others are included but other modules will be done in separate PRs.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fixed isPPC64().
>   Consolidated switch cases in ArchTest.
>   Moved mapping of build TARGET_OS and TARGET_CPU to the build
>   to avoid multiple mappings in more than one place.

Thanks! PPC64 parts look good and the test has passed on both endianness versions.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13357#pullrequestreview-1381866371