RFR: 7903120: os.simpleArch is x64 for linux-loongarch64/mips64/mips64el in @require context [v2]

[Jonathan Gibbons]

On Mon, 14 Mar 2022 13:18:39 GMT, Ao Qi <aoqi at openjdk.org> wrote:

>> Also set simpleArch to mips64, when os.arch is mips64el.
>> 
>> Tested on loongarch64 and mips64. After 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 on loongarch64 and mips64.
>
> Ao Qi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   useless code

Marked as reviewed by jjg (Lead).

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PR: https://git.openjdk.java.net/jtreg/pull/64