dev-util/nvidia-cuda-toolkit-10.1.105: Fix installation location of executables

dev-util/nvidia-cuda-toolkit-10.1.105: Fix installation location of executables

Fixes failures when invoking nvcc. link.stub and prelink.stub need to be
in crt subdirectory otherwise nvcc fails to find them.
Also extras/demo_suite were not executable.

Thanks to Jan Vesely and Nathaniel R. Lewis, this fix was derived from
patches from them.

Closes: https://github.com/gentoo/gentoo/pull/11735
Closes: https://bugs.gentoo.org/684392
Signed-off-by: Jason Zaman <perfinion@gentoo.org>
Package-Manager: Portage-2.3.62, Repoman-2.3.11