package/taglib: fix CVE-2017-12678

In TagLib 1.11.1, the rebuildAggregateFrames function in
id3v2framefactory.cpp has a pointer to cast vulnerability, which allows
remote attackers to cause a denial of service or possibly have
unspecified other impact via a crafted audio file.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>