sqlite: make constants public (#12485)

vlib/sqlite/sqlite_test.v

@@ -29,3 +29,10 @@ fn test_sqlite() {
 	db.close() or { panic(err) }
 	assert !db.is_open
 }
+
+fn test_can_access_sqlite_result_consts() {
+	assert sqlite.sqlite_ok == 0
+	assert sqlite.sqlite_error == 1
+	assert sqlite.sqlite_row == 100
+	assert sqlite.sqlite_done == 101
+}