[1/6] msi/tests: Determine Wow64 mode just once.

[testbot at testbot.winehq.org]

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
http://testbot.winehq.org/JobDetails.pl?Key=6073

Your paranoid android.


=== W2K8SE (32 bit install) ===
Timeout

=== W7PROX64 (64 bit install) ===
install.c:10489: Test failed: key not created