RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ ba83ddc3c4e2fc16865b43f87081ab403a4941a9

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yangjie11 ba83ddc3c4 [SConscript] change libcpu to LIBARCH,and correcte letter case		5 lat temu
..
SConscript	ba83ddc3c4 [SConscript] change libcpu to LIBARCH,and correcte letter case	5 lat temu
ptrace.h	bde47018b8 [libcpu] Add SConscript in libcpu.	7 lat temu
stack.c	72782e9203 convert end of line	13 lat temu