Update topics/about_reflection.js

Naming constructors for A and B shows that the name of the constructor:
* of A is "makeA" (makes more sense than having "" here, because it's an anonymous function, or maybe give some info on that?)
* of B is also "makeA" (because B's prototype is A(), which is a way of having inheritance)

It might need a bit more information/documentation/pointers though, as it's a hairy subject imho