[example] fix using any in kernel base class,test=develop

[Leonardo-Ding]

去除kernel基类中依赖any的example PR: (1) 原有op_lite.h的OpLite基类中和Op子类中都有ParamBase，通过AttachParam()运行时绑定，这里存在重复，通过Op基类定义纯虚函数访问子类实现予以去除； (2) op和kernel中都需要访问OpParam, 每个Op子类通过AttachKernel()把OpParam传递给对应的Kernel子类，这里通过shared_ptr管理需要传递的OpParam，Kernel基类中定义的Any形式的param予以去除，把相应的SetParam()改成纯虚函数（在子类中实现），把基类中的Param()去除挪到子类中实现； // kernel.h [-] template <typename T> [-] void SetParam(T param) { [-] param_.set(param); [-] } [-] template <typename P> [-] P& Param() const { [-] return *param_.get_mutable<P>(); [-] } [+] virtual void SetParam(const std::shared_ptroperators::ParamBase& op_param) = 0; [-] mutable operators::Any param_; ...... // conv_compute.h [+] using param_t = operators::ConvParam; [+] void SetParam (const std::shared_ptroperators::ParamBase& op_param) override { [+] param_ = std::dynamic_pointer_cast<param_t>(op_param); [+] } [+] param_t& Param() { [+] CHECK(param_); [+] return *param_; [+] } ...... // op_lite.h [-] mutable operators::ParamBase *op_param_{nullptr}; [+] virtual operators::ParamBase OpParam() const = 0; ...... // conv_op.h [+] ConvOpLite() { param_ = std::make_shared<param_t>(); } [+] operators::ParamBase OpParam() const override { return param_.get(); } [-] mutable ConvParam param_; [+] std::shared_ptr<param_t> param_;

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