message: Fix incorrect annotation tag in tf.Variable
  In tf.Variable the annotation tag of `@compatiblity` should be `@compatibility`
diff: @@ -119,7 +119,7 @@ class Variable(object):
  various `Optimizer` classes use this collection as the default list of
  variables to optimize.
  - @compatiblity(eager)
  + @compatibility(eager)
  `tf.Variable` is not compatible with eager execution. Use
  `tfe.Variable` instead which is compatable with both eager execution
  and graph construction. See [the TensorFlow Eager Execution
  