Debugger: Add upgrade path for 2.8 kit debugger settings

Change-Id: I1fd01d46127b2a1dc351c789c9ba537515baba0b
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/debugger/debuggerkitinformation.h

@@ -153,6 +153,7 @@ public:
         { return DebuggerKitInformation::validateDebugger(k); }
 
     void setup(ProjectExplorer::Kit *k);
+    void fix(ProjectExplorer::Kit *k);
 
     static const DebuggerItem *debugger(const ProjectExplorer::Kit *kit);