RFR: 8268293: VectorAPI cast operation on mask and shuffle is broken [v2]

[Jatin Bhateja]

> Existing implementation of VectoMask.cast and VectorShuffle.cast operation do not generate correct mask compliant with the species passed as the argument.
> 
> This patch fixes the implementation and adds the corresponding  cast operation test cases to VectorAPI regression suite.

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:

 - 8268293: Correcting file permissions.
 - Merge http://github.com/openjdk/jdk into JDK-8268293
 - 8268293: Chaining gen-tests.sh file permissions.
 - 8268293: VectorAPI cast operation on mask and shuffle is broken

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

Changes: https://git.openjdk.java.net/jdk/pull/4392/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4392&range=01
  Stats: 3470 lines in 65 files changed: 2249 ins; 886 del; 335 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4392.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4392/head:pull/4392

PR: https://git.openjdk.java.net/jdk/pull/4392