add nv12_test

BUG=chrome-os-partner:41644
TEST=run nv12_test

Change-Id: I03d4a70053d107a566aeca361682c0787e7cdcc0
Signed-off-by: Dominik Behr <dbehr@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/284925
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
5 files changed