Add the pi desktop oem user to the adm and sudo groups

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (2.694) UNRELEASED; urgency=medium
+
+  * Add the pi desktop oem user to the adm and sudo groups, as that is needed
+    for wifi configuration.
+
+ -- Łukasz 'sil2100' Zemczak <lukasz.zemczak@ubuntu.com>  Tue, 20 Oct 2020 17:25:35 +0200
+
 livecd-rootfs (2.693) groovy; urgency=medium
 
   * Build classic raspi server images by default from the 'classic' branch now.

live-build/ubuntu/hooks/099-ubuntu-image-customization.chroot

@@ -12,7 +12,7 @@ if [ "$IMAGEFORMAT" == "none" ]; then
         chown syslog:adm /var/log/syslog
 
         # Create the oem user account
-        /usr/sbin/useradd -d /home/oem -m -N -u 29999 oem
+        /usr/sbin/useradd -d /home/oem -G adm,sudo -m -N -u 29999 oem
 
         /usr/sbin/oem-config-prepare --quiet
         touch "/var/lib/oem-config/run"