message: Fix face recognition JS sample
diff: <html>
  <head>
  - <script src="utils.js" type="text/javascript"></script>
  + <script async src="../../opencv.js" type="text/javascript"></script>
  + <script src="../../utils.js" type="text/javascript"></script>
  <script type='text/javascript'>
  var netDet = undefined, netRecogn = undefined;
  var persons = {};
  -var utils = new Utils('');
  //! [Run face detection model]
  function detectFaces(img) {
  @@ -68,6 +68,7 @@ function recognize(face) {
  //! [Recognize]
  function loadModels(callback) {
  + var utils = new Utils('');
  var proto = 'https://raw.githubusercontent.com/opencv/opencv/3.4/samples/dnn/face_detector/deploy.prototxt';
  var weights = 'https://raw.githubusercontent.com/opencv/opencv_3rdparty/dnn_samples_face_detector_20180205_fp16/res10_300x300_ssd_iter_140000_fp16.caffemodel';
  var recognModel = 'https://raw.githubusercontent.com/pyannote/pyannote-data/master/openface.nn4.small2.v1.t7';
  @@ -187,7 +188,7 @@ function main() {
  };
  // Load opencv.js
  -utils.loadOpenCv(() => {
  +cv['onRuntimeInitialized']=()=>{
  main();
  });
  </script>
  