WinRT: Display error message when configuring with -no-opengl

-no-opengl is not a supported option when compiling for WinRT or Windows
Phone. Hence bail out early to avoid compilation errors at later stage.

Task-number: QTBUG-48041
Change-Id: I449b8935b95f0b75139a0f7bfa13256ea3fe95e5
Reviewed-by: Andrew Knight <andrew.knight@intopalo.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>