package/opencv fix mistake in conflict statement involving gcc (#13959)
package/opencv fix mistake in conflict statement involving gcc (#13959)

* fix mistake in conflict

* extend CudaPackage to resolve cuda-gcc conflicts

iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,LLNL/spack,iulian787/spack