Fix deadlinks in fluid documentation

[weixing02]

fix #9748

Fix most of deadlinks in fluid documentation, but there are still several deadlinks that i can't solve:

---

file:

• https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/build_and_install/pip_install_cn.rst
• https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/build_and_install/pip_install_en.rst

page:
-http://www.paddlepaddle.org/docs/develop/documentation/fluid/en/build_and_install/pip_install_en.html

deadlinks:

• http://www.paddlepaddle.org/docs/develop/documentation/fluid/en/build_and_install/build_and_install/paddleci.png

---

file:

• https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/design/motivation/api.md

page:

• http://www.paddlepaddle.org/docs/develop/documentation/fluid/en/design/motivation/api.html

deadlinks:

• https://github.com/PaddlePaddle/book/tree/develop/gan

---

file:
https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/design/motivation/refactorization.md

page:
http://www.paddlepaddle.org/docs/develop/documentation/fluid/en/design/motivation/refactorization.html

deadlinks:

• http://api.paddlepaddle.org/graphviz?dot=https://gist.githubusercontent.com/reyoung/53df507f6749762675dff3e7ce53372f/raw/49caf1fb70820fb4a6c217634317c9306f361f36/op_op_with_kern_class_diagram.dot
• http://api.paddlepaddle.org/graphviz?dot=https://gist.githubusercontent.com/reyoung/53df507f6749762675dff3e7ce53372f/raw/dd598e8f1976f5759f58af5e5ef94738a6b2e661/op.dot
• http://api.paddlepaddle.org/graphviz?dot=https://gist.githubusercontent.com/reyoung/53df507f6749762675dff3e7ce53372f/raw/9d7f4eba185cf41c8e2fbfb40ae21890dbddcd39/op_with_kernel.dot

---

file:

• https://github.com/PaddlePaddle/Paddle/blob/develop/doc/fluid/design/multi_devices/operator_kernel_type.md

page:

• http://www.paddlepaddle.org/docs/develop/documentation/fluid/en/design/multi_devices/operator_kernel_type.html

deadlinks:

• http://01org.github.io/mkl-dnn/structmkldnn_1_1memory.html