RT-Thread/rt-thread: KM https://github.com/RT-Thread/rt-thread.git @ ee55c58ce43cf2405481db11df187af3aff74eb4

Bernard Xiong 8da9f78d72 [libc] remove rtlibc		4 rokov pred
..
none-gcc	8da9f78d72 [libc] remove rtlibc	4 rokov pred
sys	8da9f78d72 [libc] remove rtlibc	4 rokov pred
SConscript	56e3571e8a implement delay.c/.h	4 rokov pred
delay.c	56e3571e8a implement delay.c/.h	4 rokov pred
delay.h	56e3571e8a implement delay.c/.h	4 rokov pred
dirent.h	dd9db58a86 优化dfs.h和dirent.h的包含关系	4 rokov pred
fcntl.h	8da9f78d72 [libc] remove rtlibc	4 rokov pred
readme.md	f9ba41f4c2 更改libc目录为common 以及 none-gcc	5 rokov pred
stdlib.c	3c05a4e719 [compoenets] auto & manual formatted	5 rokov pred
termios.h	3c05a4e719 [compoenets] auto & manual formatted	5 rokov pred
time.c	19c5088bb8 [libc][time] 修复posix相关函数没有进行临界区保护的问题	4 rokov pred
unistd.c	6697fa0ff5 [sleep] 加入调度器尚未运行时的延时情况	4 rokov pred

Attentions

This folder is "common" for all toolchains.
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'])
```