Update ExtUtils-MakeMaker to CPAN version 6.86

  [DELTA]

6.86 Sat Jan  4 12:17:53 GMT 2014

    No changes from 6.85_07

6.85_07 Wed Jan  1 18:55:22 GMT 2014
    Bug fixes:
    * Expanded test coverage for metafiles

    Doc fixes:
    * Documentation expanded to mention JSON metafiles

6.85_06 Mon Dec 30 23:14:37 GMT 2013
    Bug fixes:
    * Explicitly require dynaloader before using mod2fname

6.85_05 Sun Dec 29 11:25:00 GMT 2013
    Bug fixes:
    * Export 'configure' section of prereqs when meta-spec version 2

    Doc fixes:
    * Document BUILD_REQUIRES defaults

6.85_04 Mon Dec 23 15:00:14 GMT 2013

    No changes since v6.85_03 fixing repo tags

6.85_03 Mon Dec 23 14:55:37 GMT 2013
    Bug fixes:
    * RT#91540 PREREQ_FATAL not recognised on command line

6.85_02 Tue Dec 17 10:13:28 GMT 2013
    New features:
    * Added PPM_UNINSTALL_EXEC and PPM_UNINSTALL_SCRIPT options
      to PPD generation

6.85_01 Mon Dec 16 13:15:43 GMT 2013
    Bug Fixes:
    * harden xsubpp locating loop in MM_Unix