Add full ASLv2 copyright notice to commit-msg hook

Users will be receiving a copy of this script directly onto their
systems, so they should really have the copyright notice associated
with the code and where they can find the complete license text.

Change-Id: I34ca34fbd5560ffd1a92fc1fe8b43ab49175fb19
Signed-off-by: Shawn O. Pearce <sop@google.com>
diff --git a/src/main/java/com/google/gerrit/server/ssh/scproot/hooks/commit-msg b/src/main/java/com/google/gerrit/server/ssh/scproot/hooks/commit-msg
index 1ff228c..a27c87a 100644
--- a/src/main/java/com/google/gerrit/server/ssh/scproot/hooks/commit-msg
+++ b/src/main/java/com/google/gerrit/server/ssh/scproot/hooks/commit-msg
@@ -1,4 +1,21 @@
 #!/bin/sh
+#
+# Part of Gerrit Code Review (http://code.google.com/p/gerrit/)
+#
+# Copyright (C) 2009 The Android Open Source Project
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# 
+# http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# 
 
 MSG="$1"