Fixes QTIFW-322, missing magic cookie in installer binary
Fixes QTIFW-322, missing magic cookie in installer binary

* on mac magic cookie is kept in install.dat and not in installer binary itself

Change-Id: I568bbdf7a0bcf3b6efeda0bdfe2141e15c6c73aa
Reviewed-by: Tim Jenssen <6a21f175c697b4129e1bafb6e9b52078bb1a6738@digia.com>

olear/qtifw,olear/qtifw,olear/qtifw,olear/qtifw