message: Fix layout_optimizer_test on Windows.
  The issue was an initializer_list was used after it went out of scope.
diff: @@ -84,8 +84,9 @@ class LayoutOptimizerTest : public GrapplerTest {
  ops::Const(s->WithOpName("Filter"), Input::Initializer(filter_data));
  ops::Conv2D::Attrs attrs;
  + const int kExplicitPaddings[] = {0, 0, 1, 2, 3, 4, 0, 0};
  if (padding == "EXPLICIT") {
  - attrs = attrs.ExplicitPaddings({0, 0, 1, 2, 3, 4, 0, 0});
  + attrs = attrs.ExplicitPaddings(kExplicitPaddings);
  }
  Output conv = ops::Conv2D(s->WithOpName("Conv2D").WithDevice(device), input,
  