fix(release): update support for xgo tool (#7576) (#7586)

* update support for xgo tool

(cherry picked from commit 479a7fb)

go.mod

@@ -71,4 +71,5 @@ require (
 	gopkg.in/DataDog/dd-trace-go.v1 v1.13.1 // indirect
 	gopkg.in/square/go-jose.v2 v2.3.1
 	gopkg.in/yaml.v2 v2.2.4
+	src.techknowlogick.com/xgo v1.4.1-0.20210311222705-d25c33fcd864
 )

go.sum

@@ -877,3 +877,5 @@ honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 sourcegraph.com/sourcegraph/appdash v0.0.0-20180110180208-2cc67fd64755/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
 sourcegraph.com/sourcegraph/appdash-data v0.0.0-20151005221446-73f23eafcf67/go.mod h1:L5q+DGLGOQFpo1snNEkLOJT2d1YTW66rWNzatr3He1k=
+src.techknowlogick.com/xgo v1.4.1-0.20210311222705-d25c33fcd864 h1:wBdOhmwnc6zZZzlGdhZLxBk2yDzKcQoqB5C9fePlORM=
+src.techknowlogick.com/xgo v1.4.1-0.20210311222705-d25c33fcd864/go.mod h1:31CE1YKtDOrKTk9PSnjTpe6YbO6W/0LTYZ1VskL09oU=

tools.go

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2021 Dgraph Labs, Inc. and Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// +build tools
+package tools
+
+import (
+	_ "src.techknowlogick.com/xgo"
+)