ClangRefactoring: Move generated files to own messages

There must be a management about it but this will be added in a different
change set.

Change-Id: I47b6ce7f671f1c8ae07083d6d99c534069e3cc1a
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/tools/clangrefactoringbackend/source/symbolindexinginterface.h

@@ -38,7 +38,7 @@ public:
     SymbolIndexingInterface &operator=(const SymbolIndexingInterface&) = delete;
 
     virtual void updateProjectParts(V2::ProjectPartContainers &&projectParts,
-                                    V2::FileContainers &&generatedFiles) = 0;
+                                    const V2::FileContainers &generatedFiles) = 0;
 
 protected:
     ~SymbolIndexingInterface() = default;