Changes

lstopo/x11+windows: show the input filename in the window title
Useful when you want to compare different outputs and can't remember 
which one is which XML/FSROOT/CPUID.
On Unix, we even only show the basename (or the last directory when
relevant).
For the record, we don't display it in the legend because it's easy to
add with --append-legend
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

contrib/ci: add a comment in the sonarscanner job
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

opencl/nvidia: properly detect the PCI domain of NVIDIA GPUs
Instead of hardwiring it to 0.
NVIDIA finally implemented this in CUDA 10.2. I couldn't find it in
their OpenCL extenstions, but they told me it's implemented. It's the
very next extension value (0x400a), it reports the right result, and
following extension values (0x400b+) still report errors.
Thanks to François Rue and the wonderful PlaFRIM team for the help.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>