RFR: 7903138: os.simpleArch is x64 for linux-riscv64 in @require context [v3]

[Jonathan Gibbons]

On Wed, 30 Mar 2022 08:10:46 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

>> RISC-V Port has been integrated into JDK mainline recently ([JDK-8276799](https://bugs.openjdk.java.net/browse/JDK-8276799)). Set simpleArch to riscv64 when os.arch is riscv64
>> 
>> Tested on  Linux riscv64. With the patch, [test/hotspot/jtreg/compiler/vectorapi/TestMaskedMacroLogicVector.java](https://github.com/openjdk/jdk/blob/jdk-19%2B13/test/hotspot/jtreg/compiler/vectorapi/TestMaskedMacroLogicVector.java) was successfully skipped.
>
> Feilong Jiang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   remove riscv in comment

Marked as reviewed by jjg (Lead).

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PR: https://git.openjdk.java.net/jtreg/pull/66