[PATCH] user32/tests: Add more tests for SetWindowPos() on child window.

[Marvin]

Hi,

While running your changed tests on Windows, 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=46422

Your paranoid android.


=== debian9 (64 bit WoW report) ===

user32:
win.c:9382: Test failed: pos = 014a015e