Adapt the mkspec which was forgotten in change
b0ec05f27b.
Task-number: QTBUG-48431
Task-number: QTBUG-51686
Change-Id: Ie95e650de8b7a7027979ec637fb77c7f0357a598
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>