QmlJS: Fix qml type info by reintroducing workaround exports.

src/libs/qmljs/qmljstypedescriptionreader.cpp

@@ -172,6 +172,8 @@ void TypeDescriptionReader::readComponent(UiObjectDefinition *ast)
         return;
     }
 
+    // ### for backwards compatibility until fixed: export by cpp name
+    fmo->addExport(fmo->className(), "", ComponentVersion());
     _objects->insert(fmo->className(), fmo);
 }