dl: add go1.15.6 and go1.14.13

For golang/go#42973
For golang/go#42974

Change-Id: I3ea88b93f39223563f13f8290c8b0244ed4135e7
Reviewed-on: https://go-review.googlesource.com/c/dl/+/275292
Run-TryBot: Carlos Amedee <carlos@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Carlos Amedee <carlos@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
diff --git a/go1.14.13/main.go b/go1.14.13/main.go
new file mode 100644
index 0000000..ed04626
--- /dev/null
+++ b/go1.14.13/main.go
@@ -0,0 +1,24 @@
+// Copyright 2020 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 go1.14.13 command runs the go command from Go 1.14.13.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.14.13
+//     $ go1.14.13 download
+//
+// And then use the go1.14.13 command as if it were your normal go
+// command.
+//
+// See the release notes at https://golang.org/doc/devel/release.html#go1.14.minor
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.14.13")
+}
diff --git a/go1.15.6/main.go b/go1.15.6/main.go
new file mode 100644
index 0000000..d670736
--- /dev/null
+++ b/go1.15.6/main.go
@@ -0,0 +1,24 @@
+// Copyright 2020 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 go1.15.6 command runs the go command from Go 1.15.6.
+//
+// To install, run:
+//
+//     $ go get golang.org/dl/go1.15.6
+//     $ go1.15.6 download
+//
+// And then use the go1.15.6 command as if it were your normal go
+// command.
+//
+// See the release notes at https://golang.org/doc/devel/release.html#go1.15.minor
+//
+// File bugs at https://golang.org/issues/new
+package main
+
+import "golang.org/dl/internal/version"
+
+func main() {
+	version.Run("go1.15.6")
+}