sysfsutils: fetch a supported fork from github

Debian does the same:
https://packages.debian.org/source/sid/sysfsutils



Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>