make mrproper 、make clean 、make distclean

参考：

https://blog.csdn.net/mish84/article/details/26003963

Cleaning targets:
　　　　　　clean - Remove most generated files but keep the config and
　　　　　　　　　 enough build support to build external modules
　　　　　　mrproper - Remove all generated files + config + various backup files
　　　　　　distclean - mrproper + remove editor backup and patch files