Build type information on first use (load-time), instead of using a hardcoded list

--HG--
branch : dynamiccore2

src/modules/graphics/ParticleSystem.cpp

@@ -50,6 +50,8 @@ float calculate_variation(float inner, float outer, float var)
 
 } // anonymous namespace
 
+love::Type ParticleSystem::type(&Drawable::type);
+
 ParticleSystem::ParticleSystem(Texture *texture, uint32 size)
 	: pMem(nullptr)
 	, pFree(nullptr)