.arguments and .caller for `new` invocations

[claudepache]

Consider:

function f() {
  return f.arguments;
}

new f(1,2,3);

and

function f() {
     return f.caller;
}

function g() {
    return new f();
}

g();

Unsurprisingly, in tested implementations, .caller and .arguments work the same way regardless whether the receiver has been [[Call]]ed or has been [[Construct]]ed. TODO:

• [x] Mention it in analysis.md.
• [x] Fix a technical bug in spec.md: the ArgumentsList component of the execution context is currently not populated for “new” invocations.