emasatsugu: add tool to print 'emasatsugu'

Change-Id: I05a9cabdd05cbb9ebce6abe10eaa14a5248c1358
Reviewed-on: https://go-review.googlesource.com/132297
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

emasatsugu/main.go

@@ -0,0 +1,12 @@
+// Copyright 2018 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.
+
+// emasatsugu prints the author's username.
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("emasatsugu")
+}