build-x86-images.sh: use lightdm instead of lxdm

Lxdm is an old project with, the last release is from 2015 and users
sometimes report lxdm giving them a black unresponsive screen after
an update.

LightDM is much more maintained and much more common nowadays.

Also switch the lxqt image to sddm, other distributions which ship an
lxqt variant also seem to use sddm.

build-x86-images.sh.in

@@ -36,20 +36,20 @@ build_variant() {
             SERVICES="$SERVICES dhcpcd wpa_supplicant acpid"
         ;;
         enlightenment)
-            PKGS="$PKGS $XORG_PKGS lxdm enlightenment terminology udisks2 firefox"
-            SERVICES="$SERVICES acpid dhcpcd wpa_supplicant lxdm dbus polkitd"
+            PKGS="$PKGS $XORG_PKGS lightdm lightdm-gtk3-greeter enlightenment terminology udisks2 firefox"
+            SERVICES="$SERVICES acpid dhcpcd wpa_supplicant lightdm dbus polkitd"
         ;;
         xfce)
-            PKGS="$PKGS $XORG_PKGS lxdm xfce4 gnome-themes-standard gnome-keyring network-manager-applet gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
-            SERVICES="$SERVICES dbus elogind lxdm NetworkManager polkitd"
+            PKGS="$PKGS $XORG_PKGS lightdm lightdm-gtk3-greeter xfce4 gnome-themes-standard gnome-keyring network-manager-applet gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
+            SERVICES="$SERVICES dbus elogind lightdm NetworkManager polkitd"
         ;;
         mate)
-            PKGS="$PKGS $XORG_PKGS lxdm mate mate-extra gnome-keyring network-manager-applet gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
-            SERVICES="$SERVICES dbus elogind lxdm NetworkManager polkitd"
+            PKGS="$PKGS $XORG_PKGS lightdm lightdm-gtk3-greeter mate mate-extra gnome-keyring network-manager-applet gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
+            SERVICES="$SERVICES dbus elogind lightdm NetworkManager polkitd"
         ;;
         cinnamon)
-            PKGS="$PKGS $XORG_PKGS lxdm cinnamon gnome-keyring colord gnome-terminal gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
-            SERVICES="$SERVICES dbus elogind lxdm NetworkManager polkitd"
+            PKGS="$PKGS $XORG_PKGS lightdm lightdm-gtk3-greeter cinnamon gnome-keyring colord gnome-terminal gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
+            SERVICES="$SERVICES dbus elogind lightdm NetworkManager polkitd"
         ;;
         gnome)
             PKGS="$PKGS $XORG_PKGS gnome firefox"
@@ -60,12 +60,12 @@ build_variant() {
             SERVICES="$SERVICES dbus elogind NetworkManager sddm"
         ;;
         lxde)
-            PKGS="$PKGS $XORG_PKGS lxde lxdm gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
-            SERVICES="$SERVICES acpid dbus dhcpcd wpa_supplicant lxdm polkitd"
+            PKGS="$PKGS $XORG_PKGS lxde lightdm lightdm-gtk3-greeter gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
+            SERVICES="$SERVICES acpid dbus dhcpcd wpa_supplicant lightdm polkitd"
         ;;
         lxqt)
-            PKGS="$PKGS $XORG_PKGS lxqt lxdm gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
-            SERVICES="$SERVICES elogind dbus dhcpcd wpa_supplicant lxdm polkitd"
+            PKGS="$PKGS $XORG_PKGS lxqt sddm gvfs-afc gvfs-mtp gvfs-smb udisks2 firefox"
+            SERVICES="$SERVICES elogind dbus dhcpcd wpa_supplicant sddm polkitd"
         ;;
         *)
             >&2 echo "Unknown variant $variant"