RFR: JDK-8287194: build failure on riscv after JDK-8286825

[Feilong Jiang]

On Tue, 24 May 2022 02:45:29 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> [JDK-8286825](https://bugs.openjdk.java.net/browse/JDK-8286825) made some renaming of hotspot file and method, the following naming changes are missing in riscv:
>> - universalNativeInvoker*--> downcallLinker*
>> - 'native invoker' -> 'downcall stub'
>> 
>> Additional testing:
>> -  [x] riscv release build
>
> Looks good.

@RealFYang @shipilev Thanks for the review.

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PR: https://git.openjdk.java.net/jdk/pull/8859