package/bcg729: new package

package/bcg729: new package

Quoting http://www.linphone.org/technical-corner/bcg729/downloads
regarding patent information:

"ITU G729 Annex A/B were offically released October/November 1996
(https://www.itu.int/rec/T-REC-G.729), hence all patents covering these
specifications shall have expired in November 2016.

Patent pool administrator confirmed most licensed patents under the
G.729 Consortium have expired (http://www.sipro.com/G729.html)."

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>