message: zlib: 1.2.11
diff: @@ -90,7 +90,7 @@ def configure(cxx_toolkit = None,
  zlib_rule = drake.Rule('zlib')
  # Specify the variables required to fetch and extract the zlib tarball.
  - zlib_version = '1.2.10'
  + zlib_version = '1.2.11'
  zlib_basename = 'zlib-%s' % zlib_version
  zlib_tarball = drake.node('zlib/%s.tar.gz' % zlib_basename)
  zlib_prefix = drake.Path('zlib')
  