LibJS: Make Array constructor take its prototype

Let's start moving towards native JS objects taking their prototype as
a constructor argument.

This will eventually allow us to move prototypes off of Interpreter and
into GlobalObject.

Libraries/LibJS/Runtime/Array.h

@@ -32,7 +32,9 @@ namespace JS {
 
 class Array final : public Object {
 public:
-    Array();
+    static Array* create(GlobalObject&);
+
+    explicit Array(Object& prototype);
     virtual ~Array() override;
 
     i32 length() const { return static_cast<i32>(elements().size()); }
@@ -45,4 +47,5 @@ private:
     static void length_setter(Interpreter&, Value);
 };
 
+
 }