Manually enable pulseaudio in root's user session

That's because auto-spawning does not work for root.

kali-config/common/hooks/kali-hacks.chroot

@@ -2,5 +2,11 @@
 
 # Disable inetd by default, update-rc.d fails to disable it by
 # default due to https://bugs.debian.org/781155
+# See https://bugs.kali.org/view.php?id=2841
 echo "Manually disabling inetd"
 systemctl disable inetd || true
+
+# Manually enabling pulseaudio for root since autospawning does
+# not work for root
+# See https://bugs.kali.org/view.php?id=2392
+systemctl --user enable pulseaudio.service || true