Pass import() options metadata as was done with define()

Author: johnjbarton

lib/loader.js

@@ -170,7 +170,7 @@ function logloads(loads) {
         step: options.address ? 'fetch' : 'locate',
         loader: loader,
         moduleName: name,
-        moduleMetadata: {},
+        moduleMetadata: options && options.metadata || {},
         moduleSource: options.source,
         moduleAddress: options.address
       }));