dl: add go1.16

Change-Id: Iddcba72f608968b663f629bfafad9ffc5ea0d9ba
Reviewed-on: https://go-review.googlesource.com/c/dl/+/292690
Trust: Alexander Rakoczy <alex@golang.org>
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

go1.16/main.go

diff --git a/go1.16/main.go b/go1.16/main.go
new file mode 100644
index 0000000..c607948
--- /dev/null
+++ b/go1.16/main.go
@@ -0,0 +1,24 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The go1.16 command runs the go command from Go 1.16.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.16
+//     $ go1.16 download
+//
+// And then use the go1.16 command as if it were your normal go
+// command.
+//
+// See the release notes at https://golang.org/doc/go1.16
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.16")
+}