buildroot

vorbis-tools: add fix for CVE-2015-6749

Fixes:
CVE-2015-6749 - invalid AIFF file causes alloca() buffer overflow.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>