README.md: Add information about os-udevrules
README.md: Add information about os-udevrules

Signed-off-by: Zubair Lutfullah Kakakhel <0e069c2b28e50c7879834cb1889890ac34260249@resin.io>

resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin,resin-os/meta-resin