Debugger: Add an option to show simple values as text annotations

Change-Id: I726d8559d7e28abd776ce483d5f670be5af09412
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/debugger/watchhandler.h

@@ -119,6 +119,8 @@ public:
     void reexpandItems();
     void recordTypeInfo(const GdbMi &typeInfo);
 
+    void setLocation(const Location &loc);
+
 private:
     DebuggerEngine * const m_engine; // Not owned
     WatchModel *m_model; // Owned.