[Checkins] [zopefoundation/zope.security] cc7478: Attempt to fix the appveyor builds

[GitHub]

  Branch: refs/heads/issue20
  Home:   https://github.com/zopefoundation/zope.security
  Commit: cc747897dc51f604157c94a77d9b6c1c051f9ba8
      https://github.com/zopefoundation/zope.security/commit/cc747897dc51f604157c94a77d9b6c1c051f9ba8
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-04-24 (Mon, 24 Apr 2017)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  Attempt to fix the appveyor builds