QtIFW

Let the binary layout function find the cookie on its own.

Saves some ugly looking call convention, as we need to find
the cookie anyway, pass the cookie instead of the position.

Change-Id: I2227576a8ad251fac5312fc477f8381287b0d36d
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>