multi: pass UpdateAddHtlc message custom records to invoice modifier

htlcswitch/interfaces.go

@@ -33,6 +33,7 @@ type InvoiceDatabase interface {
 	NotifyExitHopHtlc(payHash lntypes.Hash, paidAmount lnwire.MilliSatoshi,
 		expiry uint32, currentHeight int32,
 		circuitKey models.CircuitKey, hodlChan chan<- interface{},
+		wireCustomRecords lnwire.CustomRecords,
 		payload invoices.Payload) (invoices.HtlcResolution, error)
 
 	// CancelInvoice attempts to cancel the invoice corresponding to the