collect friend declarations

src/plugins/debugger/gdb/gdbengine.h

@@ -93,6 +93,7 @@ signals:
     void applicationOutputAvailable(const QString &output);
 
 private:
+    friend class AbstractGdbAdapter;
     friend class AttachGdbAdapter;
     friend class CoreGdbAdapter;
     friend class PlainGdbAdapter;
@@ -431,8 +432,6 @@ private:
     RemoteGdbAdapter *m_remoteAdapter; // owned
     TrkGdbAdapter *m_trkAdapter;       // owned
 
-    friend class AbstractGdbAdapter;
-
 public:
     void showMessageBox(int icon, const QString &title, const QString &text);
     void debugMessage(const QString &msg);