include: android: Add SPDX tags

Add SPDX indentifier to Apache-2.0 licensed android headers.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/android/hardware/libhardware/include/hardware/camera3.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2013 The Android Open Source Project
  *

include/android/hardware/libhardware/include/hardware/camera_common.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2012 The Android Open Source Project
  *

include/android/hardware/libhardware/include/hardware/fb.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2008 The Android Open Source Project
  *

include/android/hardware/libhardware/include/hardware/gralloc.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2008 The Android Open Source Project
  *

include/android/hardware/libhardware/include/hardware/hardware.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2008 The Android Open Source Project
  *

include/android/metadata/camera_metadata_hidden.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright 2014 The Android Open Source Project
  *

include/android/metadata/system/camera_metadata.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2012 The Android Open Source Project
  *

include/android/metadata/system/camera_metadata_tags.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2012 The Android Open Source Project
  *

include/android/metadata/system/camera_vendor_tags.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright 2014 The Android Open Source Project
  *

include/android/system/core/include/android/log.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2009 The Android Open Source Project
  *

include/android/system/core/include/cutils/compiler.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2009 The Android Open Source Project
  *

include/android/system/core/include/cutils/native_handle.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2009 The Android Open Source Project
  *

include/android/system/core/include/system/camera.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2011 The Android Open Source Project
  *

include/android/system/core/include/system/graphics.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2011 The Android Open Source Project
  *

include/android/system/core/include/system/window.h

@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 */
 /*
  * Copyright (C) 2011 The Android Open Source Project
  *