message: gapi: fix build with GCC 4.8
diff: @@ -347,12 +347,20 @@ std::unique_ptr<fluid::BufferStorage> createStorage(int capacity, int desc_width
  std::unique_ptr<fluid::BufferStorageWithBorder> storage(new BufferStorageWithBorder);
  storage->init(type, border_size, border.value());
  storage->create(capacity, desc_width, type);
  +#if defined __GNUC__ && __GNUC__ < 5
  + return std::move(storage);
  +#else
  return storage;
  +#endif
  }
  std::unique_ptr<BufferStorageWithoutBorder> storage(new BufferStorageWithoutBorder);
  storage->create(capacity, desc_width, type);
  +#if defined __GNUC__ && __GNUC__ < 5
  + return std::move(storage);
  +#else
  return storage;
  +#endif
  }
  std::unique_ptr<BufferStorage> createStorage(const cv::gapi::own::Mat& data, cv::gapi::own::Rect roi);
  @@ -360,7 +368,11 @@ std::unique_ptr<BufferStorage> createStorage(const cv::gapi::own::Mat& data, cv:
  {
  std::unique_ptr<BufferStorageWithoutBorder> storage(new BufferStorageWithoutBorder);
  storage->attach(data, roi);
  +#if defined __GNUC__ && __GNUC__ < 5
  + return std::move(storage);
  +#else
  return storage;
  +#endif
  }
  } // namespace
  } // namespace fluid
  