[rt-thread] attach redefine LV_SNPRINTF and LV_VSNPRINTF
attach
#define LV_SPRINTF_CUSTOM 1
#define LV_SPRINTF_INCLUDE LV_RTTHREAD_INCLUDE
-#define lv_snprintf rt_snprintf
-#define lv_vsnprintf rt_vsnprintf
+#define LV_SNPRINTF rt_snprintf
+#define LV_VSNPRINTF rt_vsnprintf
#define LV_SPRINTF_USE_FLOAT 0
/*=====================
