gst/quicktime/: Dual license qtmux LGPL/MIT.  Fixes #564232.

Original commit message from CVS:
* gst/quicktime/atoms.c:
* gst/quicktime/atoms.h:
* gst/quicktime/descriptors.c:
* gst/quicktime/descriptors.h:
* gst/quicktime/fourcc.h:
* gst/quicktime/ftypcc.h:
* gst/quicktime/gstqtmux.c:
* gst/quicktime/gstqtmux.h:
* gst/quicktime/gstqtmuxmap.c:
* gst/quicktime/gstqtmuxmap.h:
* gst/quicktime/properties.c:
* gst/quicktime/properties.h:
Dual license qtmux LGPL/MIT.  Fixes #564232.
diff --git a/gst/quicktime/gstqtmux.c b/gst/quicktime/gstqtmux.c
index 8e70e99..6446a41 100644
--- a/gst/quicktime/gstqtmux.c
+++ b/gst/quicktime/gstqtmux.c
@@ -17,6 +17,29 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+/*
+ * Unless otherwise indicated, Source Code is licensed under MIT license.
+ * See further explanation attached in License Statement (distributed in the file
+ * LICENSE).
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
 
 
 /**