libvorbis: CVE-2018-5146

Prevent out-of-bounds write in codebook decoding. The bug could allow
code execution from a specially crafted Ogg Vorbis file.

References:
https://www.debian.org/security/2018/dsa-4140
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5146



(From OE-Core rev: 7d5d262c03745e5c61e1e9c84f108d842d16e5ec)

Signed-off-by: Tanu Kaskinen <tanuk@iki.fi>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>