RFR: 8223347: Integration of Vector API (Incubator) [v4]

[Paul Sandoz]

> This pull request is for integration of the Vector API. It was previously reviewed under conditions when mercurial was
> used for the source code control system. Review threads can be found here (searching for issue number 8223347 in the
> title):  https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2020-April/thread.html
> https://mail.openjdk.java.net/pipermail/core-libs-dev/2020-May/thread.html
> https://mail.openjdk.java.net/pipermail/core-libs-dev/2020-July/thread.html
> 
> If mercurial was still being used the code would be pushed directly, once the CSR is approved. However, in this case a
> pull request is required and needs explicit reviewer approval. Between the final review and this pull request no code
> has changed, except for that related to merging.

Paul Sandoz has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains ten commits:

 - Merge master
 - Fix related to merge
 - HotspotIntrinsicCandidate to IntrinsicCandidate
 - Merge master
 - Fix permissions
 - Fix permissions
 - Merge master
 - Vector API new files
 - Integration of Vector API (Incubator)

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

Changes: https://git.openjdk.java.net/jdk/pull/367/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=367&range=03
  Stats: 295107 lines in 336 files changed: 292957 ins; 1062 del; 1088 mod
  Patch: https://git.openjdk.java.net/jdk/pull/367.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/367/head:pull/367

PR: https://git.openjdk.java.net/jdk/pull/367