message: photo:ppc fix MergeRobertson test
diff: @@ -213,7 +213,7 @@ TEST(Photo_MergeRobertson, regression)
  loadImage(test_path + "merge/robertson.hdr", expected);
  merge->process(images, result, times);
  -#ifdef __aarch64__
  +#if defined(__aarch64__) || defined(__PPC64__)
  const float eps = 6.f;
  #else
  const float eps = 5.f;
  