[3/5]usp10: handle Combining Diacritical Marks

[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=15517

Your paranoid android.


=== WNT4WSSP6 (32 bit usp10) ===
usp10.c:384: Test failed: 0:Wrong fRTL(1)
usp10.c:384: Test failed: 0:Wrong fLayoutRTL(1)
usp10.c:384: Test failed: 0:Wrong BidiLevel(1)
usp10.c:413: Test failed: 0:Wrong fRTL(1)
usp10.c:413: Test failed: 0:Wrong fLayoutRTL(1)
usp10.c:413: Test failed: 0:Wrong BidiLevel(1)

=== W2KPROSP4 (32 bit usp10) ===
usp10.c:384: Test failed: 0:Wrong fRTL(1)
usp10.c:384: Test failed: 0:Wrong fLayoutRTL(1)
usp10.c:384: Test failed: 0:Wrong BidiLevel(1)
usp10.c:413: Test failed: 0:Wrong fRTL(1)
usp10.c:413: Test failed: 0:Wrong fLayoutRTL(1)
usp10.c:413: Test failed: 0:Wrong BidiLevel(1)