[vectorIntrinsics] RFR: 8281562:[vectorapi] Add support for popcount operation [v3]

[Smita Kamath]

> 8281562:[vectorapi] Add support for popcount operation

Smita Kamath has updated the pull request incrementally with one additional commit since the last revision:

  Fixed operation name in vectorSupport.cpp and .hpp file

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

Changes:
  - all: https://git.openjdk.java.net/panama-vector/pull/173/files
  - new: https://git.openjdk.java.net/panama-vector/pull/173/files/f594bea9..00c42cd4

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=173&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=173&range=01-02

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/173.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/173/head:pull/173

PR: https://git.openjdk.java.net/panama-vector/pull/173