[8u] RFR 8273341: Update Siphash to version 1.0

[Zhengyu Gu]

>>
>> -Zhengyu
>>
> 
> Looks fine.
> 
> The main change causing the copyright difference seems to be
> JDK-8164738: "Convert AltHashing_test to GTest", which doesn't
> make sense for 8u.
> 
> I would, however, hold off on approval for 8u until this is
> in 11u & 17u. It still seems to be in process there at the
> present time.
> 

Yes, I always wait till a patch in 11u (if apply) before push 8u patch.

Thanks,

-Zhengyu

> Thanks,