Wx build error with Getopt::Long >= 2.43

Hi,

Someone on IRC asked:

  Does anyone know why I get the following error when 
  compiling Wx-0.9923 on windows or mac: Option spec <> 
  cannot be used with pass_through

This is a very recent change in Getopt::Long. The error is given when a
erroneous combination of configuration ('pass_through') and call (with '<>'
argument) is issued.

The change was made to address issue
https://rt.cpan.org/Ticket/Display.html?id=92462
and first shipped Getopt::Long 2.43.

I don't know what process during the Wx is the offender but
please fix it.

-- Johan