ProjectExplorer/RemoteLinux/Qnx: Use centralized access to device

ToolRunner have access to the RunControl, which have a device.
No need for another copy anymore.

Change-Id: I1b71cf2fad9ecbadba859b7963175c1b7057f94d
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/runconfiguration.cpp

@@ -1187,6 +1187,11 @@ void ToolRunner::appendMessage(const QString &msg, OutputFormat format)
     m_runControl->appendMessage(msg, format);
 }
 
+IDevice::ConstPtr ToolRunner::device() const
+{
+    return m_runControl->device();
+}
+
 
 // SimpleRunControl