QNX: Fix continuing the BlackBerry environment setup wizard

This fixes an issue that wouldn't let you continue in the
BlackBerry environment setup wizard after installing an NDK.

Task-number: QTCREATORBUG-10675
Change-Id: Id36f9ea95793f04d21304d92b2a2d0de675546f1
Reviewed-by: Mehdi Fekari <mfekari@blackberry.com>
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>