message: Rename variable to match what it is
  Summary:
  Just rename variable - it really holds the output tensors
  not the input tensors
  Test Plan: None
  Reviewers: georgep, jakeh
diff: @@ -259,13 +259,13 @@ Status BaseVisitor::HandleConstant(HloInstruction* inst) {
  Status BaseVisitor::HandleGetTupleElement(HloInstruction* inst) {
  VLOG(1) << "Processing " << inst->name();
  TF_ASSIGN_OR_RETURN(
  - ArgVectors inputs,
  + ArgVectors output_tensors,
  GetInplaceOutputTensors(tensor_map, resources_, inst, sequence));
  - CHECK_EQ(inputs.size(), 1);
  - CHECK_EQ(inputs[0].size(), CountShapes(inst->shape()));
  - for (int64 i = 0; i < inputs[0].size(); i++) {
  + CHECK_EQ(output_tensors.size(), 1);
  + CHECK_EQ(output_tensors[0].size(), CountShapes(inst->shape()));
  + for (int64 i = 0; i < output_tensors[0].size(); i++) {
  poplar::Tensor out;
  - TF_CHECK_OK(AddOutputTensor(tensor_map, inst, i, inputs[0][i]));
  + TF_CHECK_OK(AddOutputTensor(tensor_map, inst, i, output_tensors[0][i]));
  }
  return Status::OK();
  }
  