Update web-socket-js to bb5797cad.

Syncs with same change to websockify (7534574a2f).

Primary change is removal of FABridge interface.

Seems to improve overall latency by perhaps 10%. Also, the slowdown
over time in Opera is about half as bad (but still there).

include/websock.js

@@ -38,7 +38,6 @@ if (window.WebSocket) {
             WEB_SOCKET_SWF_LOCATION += "?" + Math.random();
         }
         extra += start + "web-socket-js/swfobject.js" + end;
-        extra += start + "web-socket-js/FABridge.js" + end;
         extra += start + "web-socket-js/web_socket.js" + end;
         document.write(extra);
     }());