setupapi/tests: Add tests to show that SetupIterateCabinet handles callback exceptions on newer Windows.

The rebar is the parent of the ruler, not the top level window, so
GetDlgItem was returning NULL when the window is resized.  As a result the
screen was being invalidated and repainted instead of the ruler.

On Cygwin we want to use Wine's msvcrt, unlike on Mingw.