[phobos] Unittest errors on windows with latest phobos sources

[Walter Bright]

Today's checkout of phobos breaks the unit tests on Windows:

..\dmd -O -release -nofloat -d -L/co -unittest unittest.d std\math.d 
std\stdio.d std\dateparse.d std
\date.d std\uni.d std\string.d  std\base64.d std\md5.d std\xml.d 
std\bigint.d std\regexp.d  std\comp
iler.d std\cpuid.d std\format.d std\demangle.d  std\path.d std\file.d 
std\outbuffer.d std\utf.d std\
uri.d  std\ctype.d std\random.d std\mmfile.d  std\algorithm.d 
std\array.d std\numeric.d std\function
al.d  std\range.d std\stdiobase.d std\concurrency.d  std\metastrings.d 
std\contracts.d std\getopt.d
 std\signals.d std\typetuple.d std\traits.d std\bind.d  std\bitmanip.d 
std\typecons.d  std\boxer.d
std\complex.d  std\exception.d  std\process.d  std\system.d  
std\encoding.d std\variant.d  std\strea
m.d std\socket.d std\socketstream.d  std\perf.d std\container.d 
std\conv.d  std\zip.d std\cstream.d
std\loader.d  std\__fileinit.d  std\datebase.d  std\regex.d  
std\stdarg.d  std\stdint.d  std\json.d
 std\gregorian.d  std\internal\math\biguintcore.d  
std\internal\math\biguintnoasm.d std\internal\mat
h\biguintx86.d  crc32.d  std\c\process.d  std\c\stdarg.d  
std\c\stddef.d  std\c\stdlib.d  std\c\stri
ng.d  std\c\time.d  std\c\math.d  std\c\windows\com.d  
std\c\windows\stat.d  std\c\windows\windows.d
  std\c\windows\winsock.d  std\windows\charset.d  
std\windows\iunknown.d  std\windows\registry.d  st
d\windows\syserror.d phobos.lib
std.contracts has been scheduled for deprecation. Please use 
std.exception instead.
 --- std.numeric(543) CustomFloat broken test ---
Warning: AutoImplement!(C_6) ignored variadic arguments to the 
constructor C_6(...)
 --- std.socket(314) broken test ---
 --- std.regex(3348) broken test ---

unittest
std.xml(379): unittest failure
std.complex(514): unittest failure
std.complex(519): unittest failure
The syntax of the command is incorrect.
std.exception.ErrnoException at std\process.d(327):  (No error)

--- errorlevel 1