add property isLocal to JitsiTrack

lib-jitsi-meet.js

     this.dontFireRemoveEvent = false;
     this.resolution = resolution;
     this.startMuted = false;
+    this.isLocal = true;
     var self = this;
     JitsiTrack.call(this, null, stream,
         function () {
     this.videoType = data.videoType;
     this.ssrc = ssrc;
     this.muted = false;
+    this.isLocal = false;
     if((this.type === JitsiTrack.AUDIO && data.audiomuted)
       || (this.type === JitsiTrack.VIDEO && data.videomuted)) {
         this.muted = true;
  */
 JitsiRemoteTrack.prototype.isMuted = function () {
     return this.muted;
-}
+};
 
 /**
  * Returns the participant id which owns the track.
  */
 JitsiRemoteTrack.prototype.isLocal = function () {
     return false;
-}
+};
 
 delete JitsiRemoteTrack.prototype.stop;
 

modules/RTC/JitsiLocalTrack.js

     this.dontFireRemoveEvent = false;
     this.resolution = resolution;
     this.startMuted = false;
+    this.isLocal = true;
     var self = this;
     JitsiTrack.call(this, null, stream,
         function () {

modules/RTC/JitsiRemoteTrack.js

     this.videoType = data.videoType;
     this.ssrc = ssrc;
     this.muted = false;
+    this.isLocal = false;
     if((this.type === JitsiTrack.AUDIO && data.audiomuted)
       || (this.type === JitsiTrack.VIDEO && data.videomuted)) {
         this.muted = true;
  */
 JitsiRemoteTrack.prototype.isMuted = function () {
     return this.muted;
-}
+};
 
 /**
  * Returns the participant id which owns the track.
  */
 JitsiRemoteTrack.prototype.isLocal = function () {
     return false;
-}
+};
 
 delete JitsiRemoteTrack.prototype.stop;