Fix failing QJSValue test for QObject JS wrapper prototype

We need to initialize the prototype correctly.

Change-Id: I466c132b5f6bd5761b5943aaea91ed811b82a8f7
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Initial port of connect/disconnect from V8 to V4

Change-Id: I289a49ab60cce33bf03724e93df9a9cac2b2aa1a
Reviewed-by: Lars Knoll <lars.knoll@digia.com>