Use require to resolve the path to jsdoc.
Use require to resolve the path to jsdoc.

Also add cmd extension in case user is on Windows
Original PR on openlayers/openlayers#6633

openlayers/ol3-cesium,oterral/ol3-cesium,openlayers/ol3-cesium,oterral/ol3-cesium,openlayers/ol-cesium,openlayers/ol-cesium