QNX: Fix compilation of tests

It seems like this was only meant for BlackBerry 10 and not for
QNX, so replacing the 'qnx' scope with 'blackberry'.

This change amends 8bc9b6f66a67a7b12b2ef8d927fdec83a4c17f58

Change-Id: Ic67dd1b838a07c255f45605189c62d36d4c75a73
Reviewed-by: Bernd Weimer <bweimer@blackberry.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>