Created by: Superjomn

Add contrib/inference/

• paddle_inference_api.h
• libpaddle_inference_api.a

into dist.

The current output is

total 128M
-rwxr-xr-x 1 root root 2.5K Jun 14 01:36 engine.h
-rwxr-xr-x 1 root root 1.8K Jun 14 01:36 io.h
-rw-r--r-- 1 root root  86M Jun 14 01:36 libpaddle_fluid.a
-rwxr-xr-x 1 root root  43M Jun 14 01:36 libpaddle_fluid.so
-rw-r--r-- 1 root root 217K Jun 14 01:36 libpaddle_inference_api.a
-rwxr-xr-x 1 root root 3.7K Jun 14 01:36 paddle_inference_api.h