gf-anaconda-cleanup: Remove cruft in /

In particular the presence of `/etc/resolv.conf` was confusing,
even though it wasn't used.

Delete everything except `/boot` and `/ostree`.

src/gf-anaconda-cleanup

@@ -38,5 +38,13 @@ done
 # And blow away all of /var - we want systemd-tmpfiles to be
 # canonical
 coreos_gf rm-rf "${stateroot}/var/*"
+# And finally, remove some cruft from the *physical* root as nothing should be
+# using those, Anaconda is ending up creating them.  There are other
+# dirs there like /proc /sys that nothing should be using either
+# but I think dracut might do so temporarily.  (The end state should really
+# just be /ostree in the physical root)
+for x in /dev /etc /root /home /proc /sys /tmp /run; do
+  coreos_gf rm-rf "${x}"
+done
 
 coreos_gf_shutdown