simulator: init SDL after rt_components_init

SDL may use DFS to open files. It should be run after
rt_components_init.

bsp/simulator/applications/application.c

@@ -30,6 +30,12 @@ void rt_init_thread_entry(void *parameter)
     /* initialization RT-Thread Components */
     rt_components_init();
 
+#ifdef RT_USING_RTGUI
+    /* start sdl thread to simulate an LCD. SDL may depend on DFS and should be
+     * called after rt_components_init. */
+    rt_hw_sdl_start();
+#endif /* RT_USING_RTGUI */
+
 #if defined(RT_USING_COMPONENTS_INIT) && defined(__GNUC__) && defined(RT_USING_FINSH)
     finsh_set_device(RT_CONSOLE_DEVICE_NAME);
 #endif

bsp/simulator/applications/platform.c

@@ -17,11 +17,6 @@ void rt_platform_init(void)
 
 #endif /* RT_USING_DFS */
 
-#ifdef RT_USING_RTGUI
-    /* start sdl thread to simulate an LCD */
-    rt_hw_sdl_start();
-#endif /* RT_USING_RTGUI */
-
 #ifdef _WIN32
     rt_thread_idle_sethook(rt_hw_win32_low_cpu);
 #endif