2015: gogo.slide: correct link to grind
2015: gogo.slide: correct link to grind

Change-Id: I61737b3bc156221bf139e67b0a1a804c2781cbf9
Reviewed-on: https://go-review.googlesource.com/10368
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

Karthikvb/talks,Karthikvb/talks,Karthikvb/talks,Karthikvb/talks,Karthikvb/talks,Karthikvb/talks