cmake: fix target update-ts under qt5
cmake: fix target update-ts under qt5

daodaoliang/seafile-client,haiwen/seafile-client,daodaoliang/seafile-client,daodaoliang/seafile-client,haiwen/seafile-client,haiwen/seafile-client,haiwen/seafile-client,lucius-feng/seafile-client,lucius-feng/seafile-client,losingle/seafile-client,losingle/seafile-client,wgaalves/seafile-client,wgaalves/seafile-client,wgaalves/seafile-client,losingle/seafile-client,wgaalves/seafile-client,lucius-feng/seafile-client,losingle/seafile-client,daodaoliang/seafile-client,lucius-feng/seafile-client