RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ 0613cf8ca2aa8df16fe3b67e648b67fa33890414

réplica de https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

chenjh 0613cf8ca2 [serial] 解决serial_close未清除回调接口的问题		%!s(int64=4) %!d(string=hai) anos
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SConscript	5ac5d92cbb [serial] 优化发送非阻塞时，serial_close未执行rt_completion_done的问题。	%!s(int64=4) %!d(string=hai) anos
serial.c	e72008b614 update serial drv	%!s(int64=4) %!d(string=hai) anos
serial_v2.c	0613cf8ca2 [serial] 解决serial_close未清除回调接口的问题	%!s(int64=4) %!d(string=hai) anos