qt5nmapper: Fix compatibility issue

qt5nmapper: Fix compatibility issue

qt5nmapper app fails to run with the following error:

file:///usr/share/qt5nmapper-1.0/Qt5_NMapper.qml:34:5: Type Panel unavailable
         Panel {
         ^
file:///usr/share/qt5nmapper-1.0/content/Panel.qml:118:9: Type Switch unavailable
             Switch {
             ^
file:///usr/share/qt5nmapper-1.0/content/Switch.qml:8:21: Cannot assign a value to a signal (expecting a script to be run)
         property string onText: "On"

This patch changes the string from onText to onTextstring which was
introduced with Qt 5.3

(From meta-qt5 rev: 831c66e4c2c1cdf8656723de1bd4171e2db78015)

Signed-off-by: Neena Busireddy <neena.busireddy@freescale.com>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>