QtQuickApp: Fix qmake dependency to Qt Quick Components for Symbian

QtQuickApp: Fix qmake dependency to Qt Quick Components for Symbian

The .prf to add the dependency is called qt-components.prf . This broke
building a SmartInstaller package.

Task-number: QTCREATORBUG-6075
Change-Id: I816eac60ab15f40ffc9d3c866f0bf695bfa0983e
Reviewed-on: http://codereview.qt-project.org/4641
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Paweł Polański <jaggernod@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>