Remove hybi sub directory for WebSocket layout tests

LayoutTests/http/tests/websocket/fragmented-binary-frames_wsh.py

 from mod_pywebsocket import common
 from mod_pywebsocket import stream
 
 
 def web_socket_do_extra_handshake(request):
     pass
 
 
 def web_socket_transfer_data(request):
     messages_to_send = [['Hello, ', 'world!'],
                         ['', 'Hello, ', '', 'world!', ''],
                         ['', '', ''],
                         [chr(i) for i in xrange(256)]]
     for message_list in messages_to_send:
         for index, message in enumerate(message_list):
             # FIXME: Should use better API to send binary messages when pywebsocket supports it.
             if index == 0:
                 opcode = common.OPCODE_BINARY
             else:
                 opcode = common.OPCODE_CONTINUATION
             if index < len(message_list) - 1:
                 final = 0
             else:
                 final = 1
             header = stream.create_header(opcode, len(message), final, 0, 0, 0, 0)
             request.connection.write(header + message)