Bernard Xiong a5cd7e7abd Merge pull request #3944 from mysterywolf/libc		5 éve
..
sys	237a71de27 修复common文件夹，该文件夹为armlibc/newlib/dlib的共同文件的文件夹	5 éve
SConscript	b3ab8a99e1 Signed-off-by: mysterywolf	5 éve
readme.md	c7aa6f0619 [fix bug] #3902	5 éve
termios.h	237a71de27 修复common文件夹，该文件夹为armlibc/newlib/dlib的共同文件的文件夹	5 éve
time.c	237a71de27 修复common文件夹，该文件夹为armlibc/newlib/dlib的共同文件的文件夹	5 éve
unistd.c	96acad78ba 将posix_getline.h termios.h 头文件包含从<>改为""以防止路径出现分歧	5 éve

Attention :

This folder is "common" for armlibc newlibc and dlib. It's not "common" for minilibc.
If you want to add new .c files, please do not forget to fix SConscript file too. eg:
```
if GetDepend('RT_USING_POSIX') == False:
    SrcRemove(src, ['unistd.c'])
```