Update Getopt-Long to CPAN version 2.39

  [DELTA]

  Changes in version 2.39
  -----------------------

  * Fix unneccessary warnings when @ARGV contains undefs (yes, it
    happens).

  * Passing an object as first argument to the callback handler for <>
    turned out to be a problem in cases where the argument was passed to
    other modules, e.g., Archive::Tar. Revert the change since the added
    functionality of the object is not really relevant for the <>
    callback function.

  * Silence the deprecation warnings from newgetopt.pl for the purpose
    of testing. These tests will be removed along with newgetopt.pl in
    the next major release of perl.
    http://perl5.git.perl.org/perl.git/commit/b814bbfa9a2087bc

  * Eliminiate spurious warning.

  * Retain taintedness of command line option values.

  * Document that you need to check GetOptions return value :).

  * Several other minor documentation fixes and enhancements.

  * Fix bug  #67577 Parsing of type 'o' not correct for multiple values