Revert "compile fix for no-opengl" and remove all other -ZW switches

This reverts commit f5272e73e30d2fc7c9bbd8bfbf1489ad08869f98.
Don't throw an exception (the reason -ZW was used here) in the flipper
anymore, and also fix winmain so that it doesn't use -ZW either.
Add runtimeobject.lib to QMAKE_LIBS as it is needed everywhere when we
don't use -ZW.

Change-Id: I0dba673e6aa7ab0bd5ae57a83db1863033fc25b6
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>