add copyright to rtcd files

Allows them to pass the license check in chromium.

Based on libvpx e4b3f03

BUG=chromium:795297

Change-Id: I2bb49ecb62f20d7bc5093a1732b6a8228ef5c87f

aom_dsp/aom_dsp_rtcd_defs.pl

diff --git a/aom_dsp/aom_dsp_rtcd_defs.pl b/aom_dsp/aom_dsp_rtcd_defs.pl
index e3768a7..66a6f25 100755
--- a/aom_dsp/aom_dsp_rtcd_defs.pl
+++ b/aom_dsp/aom_dsp_rtcd_defs.pl
@@ -1,3 +1,13 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
 sub aom_dsp_forward_decls() {
 print <<EOF
 /*

aom_scale/aom_scale_rtcd.pl

diff --git a/aom_scale/aom_scale_rtcd.pl b/aom_scale/aom_scale_rtcd.pl
index c44966f..62c6b3c 100644
--- a/aom_scale/aom_scale_rtcd.pl
+++ b/aom_scale/aom_scale_rtcd.pl
@@ -1,3 +1,13 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
 sub aom_scale_forward_decls() {
 print <<EOF
 struct yv12_buffer_config;

av1/common/av1_rtcd_defs.pl

diff --git a/av1/common/av1_rtcd_defs.pl b/av1/common/av1_rtcd_defs.pl
index f76f79a..476aaac 100755
--- a/av1/common/av1_rtcd_defs.pl
+++ b/av1/common/av1_rtcd_defs.pl
@@ -1,3 +1,13 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
 sub av1_common_forward_decls() {
 print <<EOF
 /*

build/make/rtcd.pl

diff --git a/build/make/rtcd.pl b/build/make/rtcd.pl
index 7add5a0..d57e0df 100755
--- a/build/make/rtcd.pl
+++ b/build/make/rtcd.pl
@@ -1,5 +1,14 @@
 #!/usr/bin/env perl
-
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
 no strict 'refs';
 use warnings;
 use Getopt::Long;