QtIFW

Fix build on OSX. BREAK_HANDLER is only needed for 7z console tool.

Change-Id: I96f00b8008a8055c7eb12523d8beb329f7322f7f
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>