gameux/tests: Run the MTA tests before the STA tests to avoid a crash on Windows 10.

[Huw Davies]

> On 1 Feb 2017, at 13:21, Marvin <testbot at winehq.org> wrote:
> 
> 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=28186
> 
> Your paranoid android.
> 
> 
> === w8 (32 bit gameexplorer) ===
> Found no trace of the test summary line or of a crash

Apparently the crash on Windows 10 was successfully avoided,
only to crash on Windows 8... ;-/

Huw.