abhi-go: adds main.go, first of many contrib towards go code
abhi-go: adds main.go, first of many contrib towards go code

Change-Id: Id9d48b4b77621d13798478fc1c4f22b08ad7c002
Reviewed-on: https://go-review.googlesource.com/48599
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/scratch