add #if guard to tests

tests/lv_test_objx/lv_test_cont.c

@@ -9,6 +9,9 @@
 #include "../../lvgl.h"
 #include "../lv_test_assert.h"
 
+#if LV_BUILD_TEST
+
+
 /*********************
  *      DEFINES
  *********************/
@@ -74,3 +77,4 @@ static void create_copy(void)
     lv_test_assert_int_eq(0, lv_obj_count_children(lv_scr_act()), "Screen's children count after delete");
 
 }
+#endif