dl: add go1.17beta1

Change-Id: I5fb9712b74c46500de7b8f34fa8fb3c1eea1fb3f
Reviewed-on: https://go-review.googlesource.com/c/dl/+/326749
Trust: Heschi Kreinick <heschi@google.com>
Run-TryBot: Heschi Kreinick <heschi@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/go1.17beta1/main.go b/go1.17beta1/main.go
new file mode 100644
index 0000000..c63efd0
--- /dev/null
+++ b/go1.17beta1/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 go1.17beta1 command runs the go command from Go 1.17beta1.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.17beta1
+//     $ go1.17beta1 download
+//
+// And then use the go1.17beta1 command as if it were your normal go
+// command.
+//
+// See the release notes at https://tip.golang.org/doc/go1.17
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.17beta1")
+}