Add Apache 2.0 license.

See https://www.apache.org/licenses/LICENSE-2.0.txt.

Signed-off-by: Matt Moyer <moyerm@vmware.com>

cmd/placeholder-name/main.go

@@ -1,7 +1,13 @@
+/*
+Copyright 2020 VMware, Inc.
+SPDX-License-Identifier: Apache-2.0
+*/
+
 package main
 
 import (
 	"fmt"
+
 	"github.com/suzerain-io/placeholder-name/pkg/hello"
 )