msctf/tests: Wait a bit for registrations to become active on Win7

[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
http://testbot.winehq.org/JobDetails.pl?Key=8042

Your paranoid android.


=== W7PRO (32 bit inputprocessor) ===
inputprocessor.c:749: Test failed: Activation came unexpectedly
inputprocessor.c:757: Test failed: Deactivation came unexpectedly

=== W7PROX64 (32 bit inputprocessor) ===
inputprocessor.c:749: Test failed: Activation came unexpectedly
inputprocessor.c:225: Test failed: Unexpected TextStoreACP_RequestLock sink
inputprocessor.c:246: Test failed: Unexpected TextStoreACP_GetSelection sink
inputprocessor.c:757: Test failed: Deactivation came unexpectedly

=== W7PROX64 (64 bit inputprocessor) ===
inputprocessor.c:749: Test failed: Activation came unexpectedly
inputprocessor.c:225: Test failed: Unexpected TextStoreACP_RequestLock sink
inputprocessor.c:246: Test failed: Unexpected TextStoreACP_GetSelection sink
inputprocessor.c:757: Test failed: Deactivation came unexpectedly