Add copyright header

gstreamer-pbutils/src/encoding_profile.rs

@@ -1,3 +1,12 @@
+// Copyright (C) 2018 Thiago Santos <thiagossantos@gmail.com>
+//                    Sebastian Dröge <sebastian@centricular.com>
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
 use ffi;
 use glib;
 use gst;