For what it's worth I don't think the figures in the original post are racist. They are simplistic representations of an African / Caribbean person but don't convey any particular negative stereotype (Africans DO have frizzy hair and are by and large proud of it so why should it be negative?)
However, in my view gollywogs most definitely ARE racist because they convey negative steretypes about Afro / Caribbean people by emphasising big red lips etc in the tradition of the black & white minstrels etc...
Just my opinion. To me anything that perpetuates an exaggerated steretype about someone's racial or ethnic background is racist because it is essentially prejudicial - whether subliminally or consciously it conditions preconceptions about people of a certain race.