tmpfiles: make wpa supplicant + flatpak actually work

These unfortunately need some files copied into /etc/, hence do so.

Author: poettering

mkosi.extra/usr/lib/tmpfiles.d/etc.conf

@@ -63,5 +63,11 @@ L? /etc/alternatives
 # PackageKit does not run without /etc/PackageKit/ and GNOME stalls
 # logout/reboot if it doesn't run.
 L? /etc/PackageKit
-# ModemManager needds its dbus policy file
-L? /etc/dbus1/systemd.d/org.freedesktop.ModemManager1.conf
+# ModemManager/WPASupplicant/Flatpak need their dbus policy files
+L? /etc/dbus-1/system.d/org.freedesktop.ModemManager1.conf
+L? /etc/dbus-1/system.d/wpa_supplicant.conf
+L? /etc/dbus-1/system.d/org.freedesktop.Flatpak.SystemHelper.conf
+# WPASupplicant also needs its configuration
+L? /etc/wpa_supplicant/wpa_supplicant.conf
+# Make sure flatpak's XDG_DATA_DIR integration works
+L?/etc/profile.d/flatpak.sh