RFR: 8272861: Add a micro benchmark for vector api [v2]

[Sandhya Viswanathan]

> 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:

  Implement review comments

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5234/files
  - new: https://git.openjdk.java.net/jdk/pull/5234/files/ca688faa..f92994cd

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5234&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5234&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5234.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5234/head:pull/5234

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