ims_usrloc_scscf: missing assignment of record_route

In update_subscriber() function, when the rs is assigned to the subs,
it is missing the record_route component, which leads to core dump in
some scenarios.

(cherry picked from commit 595b8fe06165328366865328e43c14a9ca23c386)

src/modules/ims_usrloc_scscf/subscribe.c

@@ -346,6 +346,7 @@ int update_subscriber(impurecord_t* urec, reg_subscriber** _reg_subscriber, int
     subs.callid = rs->call_id;
     subs.expires = rs->expires - act_time;
     subs.contact = rs->watcher_contact;
+    subs.record_route = rs->record_route;
     
     hash_code = core_hash(&subs.callid, &subs.to_tag, sub_dialog_hash_size);