socket: import 'long' constants in addition to 'int' from the original socket

currently it has no effect because there are not 'long' constants but I'd like not to depend on that.

gevent/socket.py

@@ -95,7 +95,7 @@ gaierror = _socket.gaierror
 for name in __socket__.__all__:
     if name[:1].isupper():
         value = getattr(__socket__, name)
-        if isinstance(value, (int, basestring)):
+        if isinstance(value, (int, long, basestring)):
             globals()[name] = value
             __all__.append(name)
     elif name == 'getfqdn':