Added OpenGL debug groups for most graphics operations when love is built in debug mode for iOS. The Xcode frame capture tool uses them to create nice visual groups for OpenGL function calls.

src/modules/graphics/opengl/ParticleSystem.cpp

@@ -852,6 +852,8 @@ void ParticleSystem::draw(float x, float y, float angle, float sx, float sy, flo
 	if (pCount == 0 || texture.get() == nullptr || pMem == nullptr || particleVerts == nullptr)
 		return;
 
+	OpenGL::TempDebugGroup debuggroup("ParticleSystem draw");
+
 	Color curcolor = gl.getColor();
 
 	static Matrix t;