RFR: 8272861: Add a micro benchmark for vector api [v3]

[Sandhya Viswanathan]

On Tue, 24 Aug 2021 20:49:52 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

>> This pull request adds a micro benchmark for Vector API.
>> The Black Scholes algorithm is implemented with and without Vector API.
>> We see about ~6x gain with Vector API for this micro benchmark using 256 bit vectors.
>
> Sandhya Viswanathan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Make constants as static final

@PaulSandoz  @ericcaspole Looking forward to your review and approval for this vector api micro benchmark.

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PR: https://git.openjdk.java.net/jdk/pull/5234