sys: fix include headers guards

sys/include/color.h

sys/include/od.h

sys/include/pipe.h

sys/include/ps.h

sys/include/shell.h

sys/include/shell_commands.h

sys/include/timex.h

sys/include/tm.h

sys/log/log_printfnoformat/log_module.h

sys/oneway-malloc/include/malloc.h

sys/posix/pthread/include/pthread.h

sys/posix/pthread/include/pthread_barrier.h

sys/posix/pthread/include/pthread_cancellation.h

sys/posix/pthread/include/pthread_cleanup.h

sys/posix/pthread/include/pthread_cond.h

sys/posix/pthread/include/pthread_mutex.h

sys/posix/pthread/include/pthread_mutex_attr.h

sys/posix/pthread/include/pthread_once.h

sys/posix/pthread/include/pthread_rwlock.h

sys/posix/pthread/include/pthread_rwlock_attr.h