Stub out serial_write as well

tannewt · tannewt · commit df84da59131b · 2018-12-07T09:32:37.000-08:00
diff --git a/ports/unix/Makefile b/ports/unix/Makefile
@@ -149,6 +149,7 @@ SRC_C = \
 	alloc.c \
 	coverage.c \
 	fatfs_port.c \
+	supervisor/stub/serial.c \
 	supervisor/stub/stack.c \
 	supervisor/shared/translate.c \
 	$(SRC_MOD)
