QtIFW

Enable setuid on Mac

Avoid a fatal error:
"FATAL: The application binary appears to be running setuid, this is a
security hole."

Change-Id: Ie6281c7095fc8b6f2bbbf449005640c52e09f7a1
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>