message: Use the correct graph for conv planner
  Reviewers: #tensorflow, jakeh
diff: @@ -59,7 +59,7 @@ Status ConvolutionPreplanning::StorePreplanConv(const HloInstruction* inst,
  CompilerResources& resources,
  int64 input_index,
  int64 kernel_index) {
  - auto& target = GetMasterGraph(resources).getTarget();
  + auto& target = GetGraph(resources, inst).getTarget();
  TF_ASSIGN_OR_RETURN(
  poplin::ConvParams conv_params,
  GetConvolutionParameters(inst, input_index, kernel_index));
  