Qnx: Fix MSVC warnings

e.g.
warning: C4482: nonstandard extension used: enum
'Qnx::Internal::BlackBerryCreatePackageStep::EditMode' used in qualified
name

Change-Id: I32b78925ad9d5c8ee938b749d7d4c3525952bdd7
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>