QNX: Fix debugging on QNX >6.5

The previous approach when debugging on pure QNX 6.5
no longer works with QNX version >6.5. Use proper way with
"set nto-executable" and "run" instead.

Change-Id: I00961236b416c42a0c81e29ea087de5ddd3a5f00
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/qnx/qnxdebugsupport.h

@@ -65,6 +65,8 @@ private:
 
     QString executable() const;
 
+    void killInferiorProcess();
+
     Debugger::DebuggerEngine *m_engine;
     int m_pdebugPort;
     int m_qmlPort;