Update Erlang.mk

Author: essen

ebin/esdl2.app

@@ -4,6 +4,7 @@
 	{modules, ['esdl2','esdl2_app','esdl2_callbacks','esdl2_sup','sdl','sdl_blend_mode','sdl_clipboard','sdl_cpu_info','sdl_cursor','sdl_events','sdl_filesystem','sdl_gl','sdl_hints','sdl_keyboard','sdl_keycode','sdl_mouse','sdl_pixels','sdl_platform','sdl_power','sdl_rect','sdl_renderer','sdl_surface','sdl_texture','sdl_ttf','sdl_version','sdl_video','sdl_window']},
 	{registered, [esdl2_sup]},
 	{applications, [kernel,stdlib]},
+	{optional_applications, []},
 	{mod, {esdl2_app, []}},
 	{env, []}
 ]}.