【fix】例子

Author: songyumeng

examples/mapboxgl/l7_snow_particle.html

@@ -37,7 +37,7 @@
         " with <span>© <a href='https://iclient.supermap.io' target='_blank'>SuperMap iClient</a> | </span>" +
         " Map Data <span>© <a href='http://support.supermap.com.cn/product/iServer.aspx' target='_blank'>SuperMap iServer</a></span> ";
 
-      var tileURL = 'http://172.16.14.44:8090/iserver/services/map-china400/rest/maps/ChinaDark/zxyTileImage.png?z={z}&x={x}&y={y}';
+      var tileURL = host + '/iserver/services/map-china400/rest/maps/ChinaDark/zxyTileImage.png?z={z}&x={x}&y={y}';
       var map = new mapboxgl.Map({
         container: 'map',
         style: {