Support addlicense tool

Add a license header template to be used with
https://github.com/google/addlicense.

BUG=None
TEST=addlicense -f LICENSE.tpl .

Change-Id: I9ebabc0dbeca7e3f65e167ddd1ec80bcce6cb300
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/4211468
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Commit-Queue: Li-Yu Yu <aaronyu@google.com>
Tested-by: Li-Yu Yu <aaronyu@google.com>
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index e8af785..c75a7f9 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -1,3 +1,7 @@
+# Copyright 2023 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 # For most projects, this workflow file will not need changing; you simply need
 # to commit it to your repository.
 #
diff --git a/LICENSE.tpl b/LICENSE.tpl
new file mode 100644
index 0000000..830cab5
--- /dev/null
+++ b/LICENSE.tpl
@@ -0,0 +1,10 @@
+{{- /*
+This is a license header template to be used with the addlicense tool:
+https://github.com/google/addlicense
+Run with:
+addlicense -f LICENSE.tpl .
+*/ -}}
+
+Copyright {{.Year}} The ChromiumOS Authors
+Use of this source code is governed by a BSD-style license that can be
+found in the LICENSE file.
diff --git a/cras/install_deps.sh b/cras/install_deps.sh
index 6eac01a..a849220 100755
--- a/cras/install_deps.sh
+++ b/cras/install_deps.sh
@@ -1,4 +1,8 @@
 #!/bin/sh
+# Copyright 2023 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 apt-get install -y \
   automake \
   build-essential \
diff --git a/scripts/audio_thread_log_viewer/example.html b/scripts/audio_thread_log_viewer/example.html
index 2fd7c9c..fc5f4b7 100644
--- a/scripts/audio_thread_log_viewer/example.html
+++ b/scripts/audio_thread_log_viewer/example.html
@@ -1,3 +1,9 @@
+<!--
+ Copyright 2023 The ChromiumOS Authors
+ Use of this source code is governed by a BSD-style license that can be
+ found in the LICENSE file.
+-->
+
 
 <html meta charset="UTF8">
 <head>
diff --git a/scripts/audio_tuning/frontend/app.yaml b/scripts/audio_tuning/frontend/app.yaml
index 1706e05..4e9795a 100644
--- a/scripts/audio_tuning/frontend/app.yaml
+++ b/scripts/audio_tuning/frontend/app.yaml
@@ -1,3 +1,7 @@
+# Copyright 2023 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 application: audio-tuning
 version: 1
 runtime: python27
diff --git a/scripts/mic_testing/frontend/app.yaml b/scripts/mic_testing/frontend/app.yaml
index 723472e..49e14d6 100644
--- a/scripts/mic_testing/frontend/app.yaml
+++ b/scripts/mic_testing/frontend/app.yaml
@@ -1,3 +1,7 @@
+# Copyright 2023 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 application: mic-testing
 version: 1
 runtime: python27
diff --git a/scripts/volume_tuning/app.yaml b/scripts/volume_tuning/app.yaml
index 4c580fa..4736752 100644
--- a/scripts/volume_tuning/app.yaml
+++ b/scripts/volume_tuning/app.yaml
@@ -1,3 +1,7 @@
+# Copyright 2023 The ChromiumOS Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
 application: volume-tuning
 version: 1-1-default-volume-step
 runtime: python27