Make CDB work for release builds.

Cleanup, remove unused options page file.

src/plugins/debugger/cdb/cdbdebugengine_p.h

@@ -63,7 +63,7 @@ public:
 
 private:
     // The exported functions of the library
-    typedef HRESULT (*DebugCreateFunction)(REFIID, PVOID *);
+    typedef HRESULT (STDAPICALLTYPE *DebugCreateFunction)(REFIID, PVOID *);
 
     DebugCreateFunction m_debugCreate;
 };