message: Update the Network-in-variable-scope exception text to point to the
  existing feature request instead of inviting the user to
  create a new one.
diff: @@ -321,7 +321,9 @@ class Network(base.Layer):
  raise ValueError(
  ("The parent of a Layer added to Network %s was garbage collected "
  "before the Layer was built. If this limitation bothers you "
  - "please, file a feature request.") % (self.name,))
  + "please, comment on "
  + "https://github.com/tensorflow/tensorflow/issues/14164.") %
  + (self.name,))
  with variable_scope.variable_scope(parent_scope):
  # Horrid hack to make Layer variable names which are direct
  # sub-layers of Networks conform to the Network variable naming
  