Replace ctrcri with ctr cri.

Signed-off-by: Lantao Liu <lantaol@google.com>

cmd/ctr/main.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2018 The containerd Authors.
+
+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.
+*/
+
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/containerd/containerd/cmd/ctr/command"
+
+	cricli "github.com/containerd/cri/cli"
+)
+
+func main() {
+	app := command.App()
+	app.Commands = append(app.Commands, cricli.Command)
+	if err := app.Run(os.Args); err != nil {
+		fmt.Fprintf(os.Stderr, "ctr: %s\n", err)
+		os.Exit(1)
+	}
+}