FFmpeg build: Disable asm for Linux build

Our old ffmpeg version doesn't compile anymore on Linux due to some
incompatibilities with newer build tools. At some point we need to update the
FFmpeg version, but this fixes it for now.

Author: MGraefe

ffmpeg/build-scripts/build_ffmpeg.sh

@@ -47,6 +47,10 @@ opts="\
 --disable-filters \
 --disable-debug"
 
+if [[ "$(uname -s)" == "Linux" ]]; then
+	opts="$opts --disable-asm"
+fi
+
 # we need no video or subtitle decoders
 # obtain list of video and subtitle decoders via:
 # ffmpeg -decoders | egrep '^ [VS][\.A-Z]{5} [^=]' | sed -E 's/^ [VS][\.A-Z]{5} +([[:graph:]]+) .*$/--disable-decoder=\1 \\/g'