Inferrence for direct `eval` calls is incorrect

[ikarienator]

We should test if the eval identifier is globally-scoped.

[michaelficarra]

Nope, it depends on the runtime value, which we cannot guarantee.

(function(){
  (function(eval){
    eval('var x = 0;');
  }(eval));
  return typeof x;
}());

So we are pessimistic, and assume all direct calls to a function named eval are direct calls to eval.