unix modtime: Convert to static module structures.
diff --git a/unix/mpconfigport.h b/unix/mpconfigport.h
index cf6e6fa..bfbb49a 100644
--- a/unix/mpconfigport.h
+++ b/unix/mpconfigport.h
@@ -17,6 +17,10 @@
 #define MICROPY_MOD_SYS_STDFILES    (1)
 #define MICROPY_ENABLE_MOD_CMATH    (1)
 
+extern const struct _mp_obj_module_t mp_module_time;
+#define MICROPY_EXTRA_BUILTIN_MODULES \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&mp_module_time }, \
+
 // type definitions for the specific machine
 
 #ifdef __LP64__