ref: f6fcd3410d7277e67b2a46cbc9f48436011be4db
parent: 188d58eaa99ed5b47af77b354e303a82614ce62a
author: Johann <johannkoenig@google.com>
date: Thu May 4 10:48:43 EDT 2017
sub pel avg variance neon: 4x block sizes BUG=webm:1423 Change-Id: Iaab2b9a183fdb54aae5f717aba95d90dc36a9e3b