Add missing license block to inspection.[ch].

Change-Id: Icc85b0990adfdaf31f246204bee0c9b9d54654a0
diff --git a/av1/decoder/inspection.h b/av1/decoder/inspection.h
index d6098f4..16d6939 100644
--- a/av1/decoder/inspection.h
+++ b/av1/decoder/inspection.h
@@ -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.
+ */
 #ifndef AOM_INSPECTION_H_
 #define AOM_INSPECTION_H_