Add x86-64 and aarch64le QNX platforms. These platforms will be
available in QNX 7.0.
Change-Id: Iba1f635ba45fddf1a1caf907415a23a510ba0818
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>