Similar to the problem found in QTcpSocket auto-test recently.
While the failure on CI looks differently (apparently, server process
starts but does not print anything), fixing the dependency does not
hurt and at least fixes the 'make check' scenario.
Change-Id: I8f29f3e492d22410533407a527f5fc8f664e7f5c
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>