Fix build

Author: tannewt

shared-module/displayio/__init__.c

@@ -10,6 +10,7 @@
 #include "shared-bindings/displayio/__init__.h"
 
 #include "shared/runtime/interrupt_char.h"
+#include "py/gc.h"
 #include "py/runtime.h"
 #include "shared-bindings/board/__init__.h"
 #include "shared-bindings/busio/I2C.h"