ghoil: add a doc for the import

Change-Id: I3d8e53f993b58dff6dba5dc04ded9e0352f03141
Reviewed-on: https://go-review.googlesource.com/48982
Reviewed-by: Daniel Morsing <daniel.morsing@gmail.com>
diff --git a/ghoil/main.go b/ghoil/main.go
new file mode 100644
index 0000000..6bd25bf
--- /dev/null
+++ b/ghoil/main.go
@@ -0,0 +1,12 @@
+// 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.
+
+// Command ghoil just prints a message.
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("containers rule!")
+}