msvcrt: Added _stricmp_l implementation

[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=23596

Your paranoid android.


=== WNT4WSSP6 (32 bit string) ===
string.c:2462: Test failed: _stricmp returned -1
string.c:2464: Test failed: _stricmp returned 1

=== W7PROX64 (64 bit string) ===
string.c:2448: Test failed: _stricmp returned -25
string.c:2450: Test failed: _stricmp returned 25
string.c:2452: Test failed: _stricmp returned -20

=== TEST64_W7SP1 (64 bit string) ===
string.c:2448: Test failed: _stricmp returned -25
string.c:2450: Test failed: _stricmp returned 25
string.c:2452: Test failed: _stricmp returned -20