ref: a9bbe53dbb8ce599100ceb7ce864d8d81dfcb858
parent: fb40b5d7a76978e6fcedf5997fd7a45571aa6b0d
author: Linfeng Zhang <linfengz@google.com>
date: Thu Sep 7 08:50:36 EDT 2017
Add 4 to 1 scaling NEON optimization BUG=webm:1419 Change-Id: If82a93935d2453e61b7647aae70983db1740bec7