Added finsh_system_init function declaration on shell.h.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2070 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/finsh/shell.h

@@ -73,6 +73,7 @@ struct finsh_shell
 void finsh_set_echo(rt_uint32_t echo);
 rt_uint32_t finsh_get_echo(void);
 
+void finsh_system_init(void);
 void finsh_set_device(const char* device_name);
 const char* finsh_get_device(void);