ports: Add ffmpeg port

This allows basic video and audio playback on banan-os!

ports/ffmpeg/build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash ../install.sh
+
+NAME='ffmpeg'
+VERSION='8.0.1'
+DOWNLOAD_URL="https://ffmpeg.org/releases/ffmpeg-$VERSION.tar.xz#05ee0b03119b45c0bdb4df654b96802e909e0a752f72e4fe3794f487229e5a41"
+DEPENDENCIES=('SDL2')
+CONFIGURE_OPTIONS=(
+	'--prefix=/usr'
+	'--target-os=none'
+	"--arch=$BANAN_ARCH"
+	"--cc=$CC"
+	"--cxx=$CXX"
+	'--enable-cross-compile'
+	'--enable-shared'
+	'--enable-gpl'
+)
+
+configure() {
+	./configure "${CONFIGURE_OPTIONS[@]}"
+}