Clang: Extend clang query

It's a first step to introduce clang query.

Change-Id: I4d001a8883f56066765ce6bc561fa3f49611c0a4
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/tools/clangrefactoringbackend/source/symbolfinder.h

@@ -28,7 +28,7 @@
 #include "clangtool.h"
 #include "findusrforcursoraction.h"
 #include "symbollocationfinderaction.h"
-#include "sourcefilecallbacks.h"
+#include "locationsourcefilecallbacks.h"
 
 #include <sourcelocationscontainer.h>
 
@@ -61,7 +61,7 @@ private:
     Utils::SmallString symbolName;
     USRFindingAction usrFindingAction;
     SymbolLocationFinderAction symbolLocationFinderAction;
-    SourceFileCallbacks sourceFileCallbacks;
+    LocationSourceFileCallbacks sourceFileCallbacks;
 
     ClangBackEnd::SourceLocationsContainer sourceLocations_;
 };