Build: fix path in ipa-ods-exporter.socket unit file

This fixes regression caused by incorrect
daemons/dnssec/ipa-ods-exporter.socket.in path template introduced
in commit 312e780041.

https://fedorahosted.org/freeipa/ticket/6495

Reviewed-By: Martin Basti <mbasti@redhat.com>

daemons/dnssec/ipa-ods-exporter.socket.in

@@ -1,5 +1,5 @@
 [Socket]
-ListenStream=@localstatedir@/opendnssec/engine.sock
+ListenStream=@localstatedir@/run/opendnssec/engine.sock
 
 [Install]
 WantedBy=sockets.target