Output ASCII art image after all init functions (inside main_mobile.c)

src/test/test_dms.c

@@ -253,3 +253,5 @@ int main(void)
 	return 0;
 }
 
+void print_image(void) {}
+

src/test/test_sms.c

@@ -162,3 +162,5 @@ int main(void)
 	return 0;
 }
 
+void print_image(void) {}
+