leighmcculloch: add a first contribution

What
===
Add a first contribution to the scratch repo.

Why
===
Because I want to contribute to Go and I'm in the GopherCon Go
Contributor Workshop!

Change-Id: Iffd46054cc6ca993d71e8572d37f3d505380ccd9
Reviewed-on: https://go-review.googlesource.com/48814
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed