add http error code to download error message
add http error code to download error message

mojodna/node-pre-gyp,mojodna/node-pre-gyp,mapbox/node-pre-gyp,mojodna/node-pre-gyp,mojodna/node-pre-gyp,mojodna/node-pre-gyp,mapbox/node-pre-gyp,mapbox/node-pre-gyp,mapbox/node-pre-gyp,mapbox/node-pre-gyp