Install SDL 2.0.18

*Install SDL 2.0.18
*Disable external SDL 2.0.18
*Cache files

.github/workflows/docker.sh

@@ -14,6 +14,24 @@ find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/^.*-Werror
 find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/^.*-Werror=.*$/ /g' {} +
 find . -name "CMakeLists.txt" ! -path "*/externals/*" -exec sed -i 's/-Werror/-W/g' {} +
 
+###############################################
+# Install SDL
+SDL2VER=2.0.18
+#SDL2
+cd $CACHEDIR
+if [[ ! -e SDL2-${SDL2VER} ]]; then
+	curl -sLO https://libsdl.org/release/SDL2-${SDL2VER}.tar.gz
+	tar -xzf SDL2-${SDL2VER}.tar.gz
+	cd SDL2-${SDL2VER}
+	./configure --prefix=/usr
+	make && cd ../
+	rm SDL2-${SDL2VER}.tar.gz
+fi
+sudo make -C SDL2-${SDL2VER} install
+sdl2-config --version
+cd /yuzu
+###############################################
+
 pip3 install conan --upgrade 
 
 mkdir build && cd build 
@@ -31,6 +49,7 @@ cmake ..                                    \
   -DENABLE_QT_TRANSLATION=ON                \
   -DBUILD_DATE="$build_date"                \
   -DYUZU_USE_QT_WEB_ENGINE=OFF              \
+  -DYUZU_USE_EXTERNAL_SDL2=OFF 		          \
   -G Ninja 
 
 ninja