Add SDL_mixer

Author: ProjectSynchro

naev/naev-ubuntu1604/Dockerfile

@@ -17,7 +17,7 @@ RUN apt-get update && apt-get install -y software-properties-common curl apt-tra
 # Install Build dependencies and utilities.
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y autopoint autoconf-archive binutils-dev \
     build-essential doxygen clang cmake ffmpeg git graphviz intltool lldb lld libfreetype6-dev libluajit-5.1-dev \
-    libopenal-dev libpng-dev libsdl2-dev libsdl2-image-dev libvorbis-dev \
+    libopenal-dev libpng-dev libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libvorbis-dev \
     libxml2-dev lua-ldoc nano ninja-build=1.7.1-1~ubuntu16.04.1 vim wget xvfb
 
 # Install Python 3.9.* from deadsnakes PPA.

naev/naev-ubuntu2004/Dockerfile

@@ -16,7 +16,7 @@ RUN apt-get update && apt-get install -y software-properties-common curl apt-tra
 # Install Build dependencies and utilities.
 RUN DEBIAN_FRONTEND=noninteractive apt-get install -y autopoint autoconf-archive binutils-dev \
     build-essential doxygen clang cmake ffmpeg git graphviz intltool lldb lld libfreetype6-dev libluajit-5.1-dev \
-    libopenal-dev libpng-dev libsdl2-dev libsdl2-image-dev libsuitesparse-dev libvorbis-dev \
+    libopenal-dev libpng-dev libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsuitesparse-dev libvorbis-dev \
     libxml2-dev lua-ldoc nano ninja-build vim wget xvfb
 
 # Install Python 3.9.* from deadsnakes PPA.

naev/naev-windows/Dockerfile

@@ -34,7 +34,8 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get install -y mxe-x86-64-w64-mingw32.sha
     mxe-x86-64-w64-mingw32.shared-vorbis mxe-x86-64-w64-mingw32.shared-libxml2 \
     mxe-x86-64-w64-mingw32.shared-openal mxe-x86-64-w64-mingw32.shared-pkgconf \
     mxe-x86-64-w64-mingw32.shared-physfs mxe-x86-64-w64-mingw32.shared-sdl2 \
-    mxe-x86-64-w64-mingw32.shared-mingw-w64 mxe-x86-64-w64-mingw32.shared-suitesparse
+    mxe-x86-64-w64-mingw32.shared-sdl2-mixer mxe-x86-64-w64-mingw32.shared-mingw-w64 \
+    mxe-x86-64-w64-mingw32.shared-suitesparse
 
 
 # Add MXE to PATH