[vectorIntrinsics] RFR: Merge panama-vector:master [v2]

[Paul Sandoz]

> Merge master changes into vectorIntrinsics branch.

Paul Sandoz has updated the pull request incrementally with two additional commits since the last revision:

 - Merge pull request #1 from nsjian/merge-with-master
   
   Merge branch 'master' into vectorIntrinsics
 - Fix assembler_aarch64.cpp merge issue and revert JDK-8253623 as the real fix JDK-8255448 was in.

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

Changes:
  - all: https://git.openjdk.java.net/panama-vector/pull/25/files
  - new: https://git.openjdk.java.net/panama-vector/pull/25/files/80db52fd..79b5f78c

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=25&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=25&range=00-01

  Stats: 155 lines in 2 files changed: 3 ins; 41 del; 111 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/25.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/25/head:pull/25

PR: https://git.openjdk.java.net/panama-vector/pull/25