[pkg-go] Bug#827219: Bug#827219: dh-golang: Built-Using calculation crashes on "golang-google-cloud"

[Michael Hudson-Doyle]

Oh, sorry, I see that the failure is when building something that
depends on golang-google-cloud. I don't have time to test it now, but
I have pushed a proposed fix to
https://anonscm.debian.org/cgit/pkg-go/packages/dh-golang.git/log/?h=bug-827219.
I'd be interested to hear if it helps!