carmen: add carmen/main.go

Change-Id: I8bb189efb00d591f40901206e7ce18bfe3005467
Reviewed-on: https://go-review.googlesource.com/48952
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

carmen/main.go

@@ -0,0 +1,11 @@
+// Copyright 2017 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("WASSUP NERDS")
+}