Function.name

[gfwilliams]

> function Bob() {
... }
undefined
> Bob.name
'Bob'

Also:

> String.name
'String'
> "Hello".name
undefined
> "Hello".__proto__.constructor.name
'String'

Problem is it's unlikely we want to use up space to store a name for every function, so we could look it up in the hard-coded symbol table for built-in stuff, and actually do a search of all JsVars to find one that names the given function. It's not ideal, but would be better than nothing.

This is probably one for #1288 and the real_prototype_chain branch though, since those would make symbol table lookups much easier.