Migrate all libs (remove fdk-aac due to license issue and wavpack as no longer supported)

build/theora.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -euo pipefail
+
+CONF_FLAGS=(
+  --prefix=$INSTALL_DIR                               # install library in a build directory for FFmpeg to include
+  --host=i686-linux                                   # use i686 linux
+  --enable-shared=no                                  # disable shared library
+  --enable-docs=no
+  --enable-fast-install=no
+  --disable-spec
+  --disable-asm
+  --disable-examples
+  --disable-oggtest                                   # disable ogg tests
+  --disable-vorbistest                                # disable vorbis tests
+  --disable-sdltest                                   # disable sdl tests
+)
+
+emconfigure ./autogen.sh "${CONF_FLAGS[@]}"
+emmake make install -j