message: Update multiUpdate calls
  Reviewers: #tensorflow, evan
diff: @@ -181,12 +181,13 @@ void MultiUpdateInternal(poplar::Graph& graph, poplar::Tensor operand,
  popops::multiUpdate(
  graph, operand, adjusted_canonical_updates,
  canonical_scatter_iIndices.reinterpret(poplar::UNSIGNED_INT), {0}, {1},
  - prog, debug_prefix);
  + prog, popops::SlicePlan(), poplar::OptionFlags(), debug_prefix);
  } else {
  popops::multiUpdateAdd(
  graph, operand, adjusted_canonical_updates,
  canonical_scatter_iIndices.reinterpret(poplar::UNSIGNED_INT), *scale,
  - {0}, {1}, prog, debug_prefix);
  + {0}, {1}, prog, popops::SlicePlan(), poplar::OptionFlags(),
  + debug_prefix);
  }
  }
  } // namespace
  