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

[Zhengyu Gu]

I would like to backport this patch to 8u for parity with Oracle 8u331.


Bug: https://bugs.openjdk.java.net/browse/JDK-8273341
Patch: 
https://github.com/openjdk/jdk/commit/6cf4cd1aa46414d9af17f3704b27d0d381a17ee8

The only conflict in 8u backport is copyright year line of altHashing.hpp

8u webrev: http://cr.openjdk.java.net/~zgu/JDK-8273341-8u/webrev.00/

Test:
   hotspot runtime


Thanks,

-Zhengyu