Correct path to genxdr after the change to Go1.5+ vendoring

lib/db/leveldb.go

@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at http://mozilla.org/MPL/2.0/.
 
-//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
+//go:generate -command genxdr go run ../../vendor/github.com/calmh/xdr/cmd/genxdr/main.go
 //go:generate genxdr -o leveldb_xdr.go leveldb.go
 
 package db

lib/discover/localpackets.go

@@ -4,7 +4,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this file,
 // You can obtain one at http://mozilla.org/MPL/2.0/.
 
-//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
+//go:generate -command genxdr go run ../../vendor/github.com/calmh/xdr/cmd/genxdr/main.go
 //go:generate genxdr -o localpackets_xdr.go localpackets.go
 
 package discover

lib/protocol/message.go

@@ -1,6 +1,6 @@
 // Copyright (C) 2014 The Protocol Authors.
 
-//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
+//go:generate -command genxdr go run ../../vendor/github.com/calmh/xdr/cmd/genxdr/main.go
 //go:generate genxdr -o message_xdr.go message.go
 
 package protocol

lib/relay/protocol/packets.go

@@ -1,6 +1,6 @@
 // Copyright (C) 2015 Audrius Butkevicius and Contributors (see the CONTRIBUTORS file).
 
-//go:generate -command genxdr go run ../../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
+//go:generate -command genxdr go run ../../../vendor/github.com/calmh/xdr/cmd/genxdr/main.go
 //go:generate genxdr -o packets_xdr.go packets.go
 
 package protocol