esp_event: fix petty include dependency issue

components/esp_event/event_loop_legacy.c

@@ -14,8 +14,8 @@
 
 #include "esp_err.h"
 #include "esp_log.h"
-#include "esp_event_legacy.h"
 #include "esp_event.h"
+#include "esp_event_legacy.h"
 
 #include "sdkconfig.h"