Enable GLES on Mac

Author: ACrazyTown

Diff for: project/lib/sdl-files.xml

@@ -305,7 +305,7 @@
 
         </section>
 
-        <section if="android || ios || windows || rpi || tvos">
+        <section if="android || ios || windows || rpi || tvos || mac">
 
             <file name="${NATIVE_TOOLKIT_PATH}/sdl/src/render/opengles/SDL_render_gles.c" />
             <file name="${NATIVE_TOOLKIT_PATH}/sdl/src/render/opengles2/SDL_render_gles2.c" />