Put Windows NTLM stuff inside consistent preprocessor directives.

Put Windows NTLM stuff inside consistent preprocessor directives.

QNtlmWindowsHandles was placed inside Q_OS_WIN in some places and in
other places inside Q_OS_WIN32. It seems that Q_OS_WIN is correct
define everywhere.

In addition placed "InitSecurityInterfaceW" inside L macro to convert
argument to wide characters in WinCE. WinCE GetProcAddress takes
LPCWSTR instead of LPCSTR.

This fixes the QtNetwork build for WEC7, where Q_OS_WIN32 apparently
is not defined. Should it be defined, is another story...

Change-Id: Id309d20c46b66139e2cb2e62349067848d8ebb4e
Reviewed-by: Shane Kearns <shane.kearns@accenture.com>