Method attribute

src/opr/test/dnn/convolution.cpp:2508–2508

public:
    MockAlgorithm(const char* name = "NotImportant") : m_name(name) {}
    Attribute attribute() const override { return Attribute::REPRODUCIBLE; }
    const char* name() const override { return m_name; }
    uint32_t type() const override {
        return megdnn::detail::Algorithm::INVALID_ALGO_TYPE;