ole32: Add StgCreateFile test and conformance fix

[Mike McCormack]

Mike Hearn wrote:

> Those two tests were failing before I wrote the patch - this test
> suite needs a lot of loving. In particular one of the last tests fails
> when run against XP ole32 for me.
> 
> In this case the test I added is on line 178 not 139 or 141. Are you
> sure you weren't getting these failures before?

The existing test suite works fine on Wine for me.

Mike