[PATCH] msctf/tests: Use wide-char string literals.

[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=83145

Your paranoid android.


=== w1064 (32 bit report) ===

msctf:
inputprocessor.c:537: Test failed: Unexpected ThreadMgrEventSink_OnSetFocus sink