cinematicexperience: fix qt5.3 compatibility

cinematicexperience will run failed on Qt5.3.0 and Qt5.3.1, error message
as below

------------------------------------------------------------
Qt5_CinematicExperience.qml:26:5: Type MainView unavailable
         MainView {
         ^
/content/MainView.qml:241:9: Type SettingsView unavailable
             SettingsView {
             ^
/content/SettingsView.qml:88:13: Type Switch unavailable
                 Switch {
                 ^
/content/Switch.qml:9:21: Cannot assign a value to a signal (expecting a script to be run)
         property string onText: "On"

                         ^
------------------------------------------------------------

This patch fix this issue and make cinematicexperience can run on qt5.3.

ref: http://wickwire2099.blogspot.tw/2014/05/qt-530-qt5-cinematic-experience.html

Signed-off-by: Yen-Chin Lee <coldnew.tw@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>