[vector api] RFR: Add Vector API mask support and comparisons for all data types for AArch64 NEON

[Yang Zhang (Arm Technology China)]

Hi,

I have a patch which adds Vector API mask operations support and implements comparisons for all data types for AArch64 NEON. 
Could you please help to review this?

Webrev:
http://cr.openjdk.java.net/~yzhang/vectorapi.mask_cmp/webrev.00/

Regards,
Yang