xf86-video-nvidia*: add nvidia-xconfig

useful for creating edid.bin files from nvidia debug logs
xf86-vide-nvidia: also install libnvidia-cfg.so
build: Allow CONCURRENCY_MAKE_LEVEL to be set on cmdline
v4l-utils: add upstream patch to fix a regression introduced by v4l-utils-fe2aa5f

Signed-off-by: Stephan Raue <stephan@openelec.tv>
kodi: update to kodi-14-2cd9438