Fix test on PPC64 buildbot. It raised an IOError (really an URLError which

derives from an IOError).  That seems valid.  Env Error includes both OSError
and IOError, so this seems like a reasonable fix.

Lib/test/test_urllib2net.py

@@ -176,7 +176,7 @@ class OtherNetworkTests(unittest.TestCase):
 
                 # XXX bug, should raise URLError
                 #('file://nonsensename/etc/passwd', None, urllib2.URLError)
-                ('file://nonsensename/etc/passwd', None, (OSError, socket.error))
+                ('file://nonsensename/etc/passwd', None, (EnvironmentError, socket.error))
                 ]
             self._test_urls(urls, self._extra_handlers())
         finally: