vulkan: add copyright notices

Change-Id: I62ec6d02a052c9e9cee9753057d55c165dfc9713
(cherry picked from commit b7f416a9cc3d136ffe4a60b5f6fb2dc8b92a623b)
diff --git a/vulkan/libvulkan/Android.mk b/vulkan/libvulkan/Android.mk
index c26b01f..3ba7ecd 100644
--- a/vulkan/libvulkan/Android.mk
+++ b/vulkan/libvulkan/Android.mk
@@ -1,3 +1,17 @@
+# Copyright 2015 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.
+
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)