package/diffutils: bump version to 3.10
Release notes:
https://lists.gnu.org/archive/html/info-gnu/2023-05/msg00009.html
Added sha1 hash provided by upstream.
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>