ref: c31d02615dbcf2d25bd24be83451a5a864b00fef
parent: 2351a73531a81dc3a0da9458dcc98136277250d4
parent: 6acd061aad8cf62000cc9117390d0c94581a8591
author: James Zern <jzern@google.com>
date: Tue Sep 20 18:33:38 EDT 2016
Merge "variance_avx2: sync variance functions with c-code"