RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ c2fca3dffedfa15044bb70f8a997ea1c3920ebe3

Meco Man c2fca3dffe 修复RTC驱动以及libc time.c库若干问题		%!s(int64=5) %!d(string=hai) anos
..
sys	c2fca3dffe 修复RTC驱动以及libc time.c库若干问题	%!s(int64=5) %!d(string=hai) anos
SConscript	b3ab8a99e1 Signed-off-by: mysterywolf	%!s(int64=5) %!d(string=hai) anos
readme.md	d5f8830177 add newlib/dlib readme	%!s(int64=5) %!d(string=hai) anos
termios.h	54143409ca 增加#include <rtconfig.h> 防止开启termios功能后报错	%!s(int64=5) %!d(string=hai) anos
time.c	c2fca3dffe 修复RTC驱动以及libc time.c库若干问题	%!s(int64=5) %!d(string=hai) anos
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	%!s(int64=5) %!d(string=hai) anos

Attentions

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'])
```