Implement VectorAPI mulAll and addAll for AArch64 NEON

[Joshua Zhu (Arm Technology China)]

> > I implemented reduction intrinsics of VectorAPI mulAll() and addAll() for
> AArch64 NEON. And related jtreg tests passed.
> > Could you please review the following patch?
> > http://cr.openjdk.java.net/~jzhu/vectorapi/01-neon-reduction.webrev.00/
> 
> Looks reasonable to me.
> 
> Do you need any help with pushing the patch?

Thanks for review, Vladimir! Yes, please help push.

Best Regards,
Joshua