package/at: bump version to 3.2.2

package/at: bump version to 3.2.2

Let's bump at to version 3.2.2 by:
- moving SITE to http://software.calhariz.com/at that is the official at
 realease site while the actual(https://salsa.debian.org/debian/at)
 doesn't provide consitent tarballs.
- rebasing 2 local patches(some some of them has not been accepted upstream
 because of removing -g root -o root while installing, while other simply
 has not been taken into account for 1 year.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>