Rename ffmpeg package, it conflicts on ubuntu with the real ffmpeg, which is inconvenient.

ffmpeg/Makefile

@@ -51,8 +51,8 @@ package:
 	cp -prv ./x264_out/* out/opt/cppse/build/x264/
 	cp -prv ./ffmpeg_out/* out/opt/cppse/build/ffmpeg/
 
-	rm -rf ffmpeg_*_amd64.deb
-	docker run -v "$$(pwd):/src/" rayburgemeestre/fpm-ubuntu:18.04 fpm -v 1.1 -s dir -t deb -n ffmpeg --license MPL2 --maintainer "Ray Burgemeestre <ray@cppse.nl>" --description "ffmpeg - build dependency" --url "https://gitea.cppse.nl/rayburgemeestre/build-config/src/branch/master/ffmpeg" --deb-generate-changes -C /src/out
+	rm -rf cppseffmpeg_*_amd64.deb
+	docker run -v "$$(pwd):/src/" rayburgemeestre/fpm-ubuntu:18.04 fpm -v 1.1 -s dir -t deb -n cppseffmpeg --license MPL2 --maintainer "Ray Burgemeestre <ray@cppse.nl>" --description "ffmpeg - build dependency" --url "https://gitea.cppse.nl/rayburgemeestre/build-config/src/branch/master/ffmpeg" --deb-generate-changes -C /src/out
 
 clean:
 	rm -rf x264