[PATCH 1/4] msvcrt: Import _logb implementation from musl.

[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=90949

Your paranoid android.


=== debiant2 (32 bit report) ===

ucrtbase:
misc.c:769: Test failed: _logb(0.000000) got errno 33
misc.c:771: Test failed: _logb(0.000000) got exception type 1

=== debiant2 (32 bit Chinese:China report) ===

ucrtbase:
misc.c:769: Test failed: _logb(0.000000) got errno 33
misc.c:771: Test failed: _logb(0.000000) got exception type 1

=== debiant2 (32 bit WoW report) ===

ucrtbase:
misc.c:769: Test failed: _logb(0.000000) got errno 33
misc.c:771: Test failed: _logb(0.000000) got exception type 1

=== debiant2 (64 bit WoW report) ===

ucrtbase:
misc.c:769: Test failed: _logb(0.000000) got errno 33
misc.c:771: Test failed: _logb(0.000000) got exception type 1