Security update for ffmpeg-4

This update for ffmpeg-4 fixes the following issues: CVE-2020-22037: Fixed unchecked return value of the initvlc function bsc1186756 CVE-2024-12361: Fixed null pointer dereference bsc1237358 CVE-2024-35368: Fixed double free via the rkmppretrieveframe function within libavcodec/rkmppdec.c...