review: look in correct location for netrc on Windows.

Change-Id: I38a58a2fb1bf6f4840cca8fe24aaa85ad3d6289e
Reviewed-on: https://go-review.googlesource.com/21252
Run-TryBot: Andrew Gerrand <adg@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>
2 files changed