Jan Bernlöhr authored Oct 30, 2020 and Brad King committed Nov 02, 2020

This fixes the following two issues with the CUDA support on QNX:

* cuda target name is not derived correctly (should be `aarch64-qnx`).
* linking `cudart` must not be linked against `rt`, `dl`, `pthread`.

This enables to use cmake's native cuda support on QNX.

Fixes: #21381