provisioning/warewulf-provision: fix patch path
---- a/provision/etc/provision.conf 2020-03-31 22:09:25.980000000 +0000
-+++ a/provision/etc/provision.conf 2020-03-31 22:09:36.370000000 +0000
+--- a/etc/provision.conf 2020-03-31 22:09:25.980000000 +0000
++++ b/etc/provision.conf 2020-03-31 22:09:36.370000000 +0000
use localdomain = yes
