RFR: 7903138: os.simpleArch is x64 for linux-riscv64 in @require context [v5]

[Feilong Jiang]

On Sat, 10 Dec 2022 18:28:38 GMT, Jonathan Gibbons <jjg at openjdk.org> wrote:

> Skara has dropped the `sponsor` label.
> 
> @feilongjiang needs to enter `/integrate` again, before this can be sponsored.

Hi @jonathan-gibbons, `sponsor` is back, could you please sponsor this PR?

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PR: https://git.openjdk.org/jtreg/pull/66