minidlna: Add patch to add compatibility with ffmpeg-7.0

minidlna: Add patch to add compatibility with ffmpeg-7.0

- From ffmpeg-7.0 the channel_layout variable has been changed to ch_layout. A minidlna
   user has submitted a patch to minidlna in May 2024 to fix this. Without this patch
   minidlna fails to build with ffmpeg-7.0 onwards.
- The patch has not yet been merged with minidlna (last commit was in May 2023) so I have
   taken the patch and applied it to the minidlna source tarball.
- Update of rootfile not required

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>