[PATCH] comdlg32/tests: Use win_skip() instead when appropriate.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=58085

Your paranoid android.


=== w7pro64 (task log) ===

Task errors:
The previous 2 run(s) terminated abnormally