PumpkinSeed: add my very own main.go

Change-Id: Icdb70013a273850ea771ccb84e0b4eb0fb956b54
Reviewed-on: https://go-review.googlesource.com/c/144165
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>

PumpkinSeed/main.go

@@ -0,0 +1,11 @@
+// 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.
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("who even needs fmt?")
+}