RFR: 8269725: AArch64: Add VectorMask query implementation for NEON [v5]

[Xiaohong Gong]

On Thu, 15 Jul 2021 01:04:36 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

>> Yes, let's do it later. But let's not forget.
>
> Sure, will do it after this patch is merged. Thanks!

Recorded to a JBS here: https://bugs.openjdk.java.net/browse/JDK-8270519

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PR: https://git.openjdk.java.net/jdk/pull/4699