Fix 3.0 try except bug

test/simple_source/bug30/02_try_except_except.py

@@ -0,0 +1,9 @@
+# From 3.0.1/lib/python3.0/_dummy_thread.py
+
+def start_new_thread(function, args, kwargs={}):
+    try:
+        function()
+    except SystemExit:
+        pass
+    except:
+        args()

uncompyle6/parsers/parse30.py

@@ -70,6 +70,7 @@ class Python30Parser(Python31Parser):
         except_suite          ::= c_stmts POP_EXCEPT jump_except POP_TOP
         except_suite_finalize ::= SETUP_FINALLY c_stmts_opt except_var_finalize END_FINALLY
                                   _jump POP_TOP
+        jump_except           ::= JUMP_FORWARD POP_TOP
 
         # In many ways 3.0 is like 2.6. The below rules in fact are the same or similar.