Gave hotshot.LogReader a close() method, to allow users to close the

file object that LogReader opens.  Used it then in test_hotshot; the
test passes again on Windows.  Thank Guido for the analysis.

Lib/hotshot/log.py

@@ -51,6 +51,9 @@ class LogReader:
         self._append = self._stack.append
         self._pop = self._stack.pop
 
+    def close(self):
+        self._reader.close()
+
     def addinfo(self, key, value):
         """This method is called for each additional ADD_INFO record.