iOS: Qt 5.7 changed the CONFIG values for device vs simulator builds

This is a quick fix, just adding the new values. It would be nicer to
make them depend on the actual Qt version, but that seems to be a bit
more involved.

Task-number: QTCREATORBUG-16102
Change-Id: I2dbd0e76f90e7aeabb0c354fe54a6a0eb041454e
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Vikas Pachdha <vikas.pachdha@theqtcompany.com>