Normative: Set "name" property for anonymous functions (#1490)

 - Changed NamedEvaluation to no longer forward to normal Evaluation
 - Set 'name' property for anonymous functions to the empty string
 - Create 'name' property before the 'prototype' property
 - Respecify 'anonymous function' to mean the 'name' property is the empty string instead of being absent
 - Change Evaluation to forward to NamedEvaluation for anonymous functions

Fixes #1049.

Author: anba