* add code for activation operation
* add code for activation operation on GPU
* add test code for activation operation
* add code for activation operation
* add code for activation on gpu ,use cudnn
* add code for activation on GPU use cudnn
* Chore: add constants.h and remove comments
Co-authored-by: wanghailu <wanghailu@qiyuanlab.com>
Co-authored-by: Liyan Zheng <liyan-zheng@outlook.com>
Hardy