use bundle.trace() when building export block

src/finalisers/shared/getExportBlock.js

@@ -11,7 +11,7 @@ export default function getExportBlock ( bundle, exportMode, mechanism = 'return
 	return bundle.toExport
 		.map( name => {
 			const prop = name === 'default' ? `['default']` : `.${name}`;
-			name = bundle.entryModule.replacements[ name ] || name;
+			name = bundle.trace( bundle.entryModule, name );
 			return `exports${prop} = ${name};`;
 		})
 		.join( '\n' );