message: Take the output of the compiler summary op when producing real summary
diff: from tensorflow.core.framework import summary_pb2
  from tensorflow.python.ops.summary_ops import tensor_summary
  -from tensorflow.python.util.tf_export import tf_export
  +from tensorflow.compiler.plugin.poplar.ops import gen_ipu_ops
  -@tf_export("summary.ipu_text")
  -def ipu_compile_summary(name, tensor, collections=None):
  +def ipu_compile_summary(name, collections=None):
  +
  + report = gen_ipu_ops.ipu_summary()
  summary_metadata = summary_pb2.SummaryMetadata(
  plugin_data=summary_pb2.SummaryMetadata.PluginData(
  plugin_name="text"))
  t_summary = tensor_summary(
  name=name,
  - tensor=tensor,
  + tensor=report,
  summary_metadata=summary_metadata,
  collections=collections)
  +
  return t_summary
  