C语言vs 2017添加 pthread.h 头文件方法

1. https://blog.csdn.net/tianzry/article/details/61933362 （process.h）下面的没成功
2. https://blog.csdn.net/yanchenyu365/article/details/84065608
3. https://blog.csdn.net/qq_35292447/article/details/103541936
4. https://zhuanlan.zhihu.com/p/97418361