Testconfig: Adding IOS stage to qt5, qtbase, qtscript, qtquick1 and qtsensors

Added IOS build stage to be executed with following jobs
 - Qt5_release/stable_Integration
 - QtBase_release_Integration
 - QtQuick1_release_Integration
 - QtScript_release_Integration
 - QtSensors_release_Integration
Each were forced to succeed, remove after verified with qt-project ci.

Change-Id: I6d709a58b3b9c4dbb9f18fc93adfab18ef5e270a
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>