RFR: 8304915: Create jdk.internal.util.Architecture enum and apply [v11]

[Martin Doerr]

On Tue, 11 Apr 2023 18:35:56 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:
> 
>   Add ppc64 as mapping to PPC64 Architecture

Thanks for the updates! PPC64 looks basically good except of a upper / lower case issue in the test:
STARTED    ArchTest::nameVsCurrent 'nameVsCurrent()'
org.opentest4j.AssertionFailedError: mismatch in Architecture.current vs ppc64 ==> expected: <PPC64> but was: <OTHER>
...
FAILED     ArchTest::nameVsCurrent 'nameVsCurrent()'
JavaTest Message: JUnit Platform Failure(s): 1

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PR Comment: https://git.openjdk.org/jdk/pull/13357#issuecomment-1504064549