py/parse: Add uerrno to list of modules to look for constants in.

py/parse.c

@@ -449,6 +449,9 @@ STATIC void push_result_token(parser_t *parser) {
 
 #if MICROPY_COMP_MODULE_CONST
 STATIC const mp_rom_map_elem_t mp_constants_table[] = {
+    #if MICROPY_PY_UERRNO
+    { MP_ROM_QSTR(MP_QSTR_errno), MP_ROM_PTR(&mp_module_uerrno) },
+    #endif
     #if MICROPY_PY_UCTYPES
     { MP_ROM_QSTR(MP_QSTR_uctypes), MP_ROM_PTR(&mp_module_uctypes) },
     #endif