Update Win32 to CPAN version 0.47

  [DELTA]

  0.47    [2013-02-21]
        - Make sure %PROCESSOR_ARCHITECTURE% is defined before calling
          Win32::GetArchName() in t/Names.t.  It may be undefined when
          the test is running under Cygwin crond.
        - In t/Names.t don't assume that LoginName or NodeName is at
          least 2 characters long; it may just be 1.