[runtime] Cleanup the way we create prototypes for builtin functions.

Pass the_hole_value as a |prototype| to let the helper function create
prototype object and properly wire it with the respective constructor
function.

Bug: v8:6459
Change-Id: I85097c02c88f00a47e62321ee3e6a3bdf6b5bcf8
Reviewed-on: https://chromium-review.googlesource.com/557799Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46341}

src/js/messages.js

@@ -22,8 +22,6 @@ var Script = utils.ImportNow("Script");
  * Set up the Script function and constructor.
  */
 %FunctionSetInstanceClassName(Script, 'Script');
-%AddNamedProperty(Script.prototype, 'constructor', Script,
-                  DONT_ENUM | DONT_DELETE | READ_ONLY);
 
 
 /**