network/*/removed_api.cpp: include qdebug.h explicitly

Since the removed API uses QDebug. Requested in code review.

This is needed for a subsequent commit (removing qdebug.h from public
headers when possible), but I split out to its own commit to ease
backporting.

Pick-to: 6.9 6.8
Change-Id: I76980634b9ebbae7cf010d99f5095aa94a825824
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

src/network/compat/removed_api.cpp

@@ -67,6 +67,9 @@ QList<QNetworkCookie> QNetworkCookie::parseCookies(const QByteArray &cookieStrin
 
 #ifndef QT_NO_DEBUG_STREAM
 #if QT_CONFIG(ssl)
+
+#include "qdebug.h"
+
 QDebug operator<<(QDebug debug, const QSslError::SslError &error)
 {
     return print(std::move(debug), error);