package/ffmpeg: add fixes from Kodi project

Adding these patches brings our ffmpeg package to the same level as the
kodi-provided ffmpeg package allowing us to switch the kodi build to
use the system-provided ffmpeg instead of its internal build when kodi
is bumped to version 19.0-Matrix.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2 files changed