CreateIntrinsics isn't passing prefix to CreateBuiltinFunction for builtin getters/setters

[syg]

CreateIntrinsics should be passing the string prefix to its meta-call to CreateBuiltinFunction so builtin getters and setters are correctly named.

[jmdyck]

Rather than adding even more prose to step 2 of CreateIntrinsics, maybe it would be better to replace

All values that are built-in function objects are created by performing CreateBuiltinFunction(steps, length, name, slots, realmRec, prototype) where steps is ..., name is ..., length is ..., slots is ..., and prototype is ....

with something like:

All values that are built-in function objects are created by invoking CreateBuiltinFunction as specified in [18 ECMAScript Standard Built-in Objects].

The latter location goes into more detail and has the advantage of not cramming it all into one algorithm step.

[jmdyck]

See PR #2833.