gensupport: fix the build.
gensupport: fix the build.

Change-Id: Ie818ee564e5c115d5719721fc6357248c0bf5236
Reviewed-on: https://code-review.googlesource.com/4026
Reviewed-by: Dave Day <4cba7a21e1f1fc896442779dcb55aeda6df97dfe@golang.org>

google/google-api-go-client,googleapis/google-api-go-client,google/google-api-go-client,googleapis/google-api-go-client