Finalized namespace objects should have properties assigned as if by Array#sort.

[jdalton]

From our earlier chat discussion I mentioned an interesting case form the mutual-all cyclical tests that we produced a namespace object of { b: "b", a: "a" } while browsers produced { a: "a", b: "b" }. It turns out it's because of step 7 of this rule:

Let sortedExports be a new List containing the same values as the list exports where the values are ordered as if an Array of the same values had been sorted using Array.prototype.sort using undefined as comparefn.