[PATCH] kernel32/tests: Trace the mapped string when FoldStringW fails.

[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=61569

Your paranoid android.


=== wxppro (32 bit report) ===

kernel32:
locale.c:3586: Test failed: Got unexpected string L"Wine\0348\0551\1323\280dWine\03c5\0308j\030c\00a0\00aa".

=== w2003std (32 bit report) ===

kernel32:
locale.c:3586: Test failed: Got unexpected string L"Wine\0348\0551\1323\280dWine\03c5\0308j\030c\00a0\00aa".