Patch to fix bug 34324

[Zhenbo Li]

Hello,
I've been working on http://bugs.winehq.org/show_bug.cgi?id=34324.
Till now, I have found two solutions, one is simple and one is
complex. Both of them would fix #34324, and I don't know which one is
better.

As Alexandre Julliard mentioned[1], I would use the value of
GetLastError() as the return (error) value in delete_files().

The simple patch would fix part of the 'todo_wine' marks.
Meanwhile, the complex patch would fix *all* todo marks about return
value in test_delete().

I really appreciate your help (especially for Dmitry Timoshkov, thank
you very much). And I'm looking for your feedbacks.

Thank you.

[1]: http://markmail.org/message/fblet7gadeusyauv#query:+page:1+mid:6eu2a72uuchhm...