Change debug output to use stream version of debug.

df757e30f8 may have fixed this for one platform,
but different platforms appear to have different ideas on what constitutes a FD.

Just use the stream operator to avoid having to face this nightmare all the
time.

Change-Id: I298c5a4b31e8a4af6b613d039cb9aee6e8263b5a
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Reviewed-by: Richard J. Moore <rich@kde.org>

src/network/socket/qnativesocketengine_unix.cpp

@@ -363,7 +363,7 @@ bool QNativeSocketEnginePrivate::setOption(QNativeSocketEngine::SocketOption opt
 bool QNativeSocketEnginePrivate::nativeConnect(const QHostAddress &addr, quint16 port)
 {
 #ifdef QNATIVESOCKETENGINE_DEBUG
-    qDebug("QNativeSocketEnginePrivate::nativeConnect() : %lli", socketDescriptor);
+    qDebug() << "QNativeSocketEnginePrivate::nativeConnect() " << socketDescriptor;
 #endif
 
     struct sockaddr_in sockAddrIPv4;