Restore stubtest 0.930 (#6663)

stdlib/symbol.pyi

@@ -1,3 +1,5 @@
+import sys
+
 single_input: int
 file_input: int
 eval_input: int
@@ -84,5 +86,13 @@ comp_if: int
 encoding_decl: int
 yield_expr: int
 yield_arg: int
+if sys.version_info >= (3, 7):
+    sync_comp_for: int
+if sys.version_info >= (3, 8):
+    func_body_suite: int
+    func_type: int
+    func_type_input: int
+    namedexpr_test: int
+    typelist: int
 
 sym_name: dict[int, str]