update api gen

`code.google.com/p/google-api-go-client/google-api-go-generator`
moved to:
`google.golang.org/api/google-api-go-generator`

and

`code.google.com/p/google-api-go-client/googleapi`
moved to:
`google.golang.org/api/googleapi`

as a consequence `schema/v1-gen.go`has been updated to reflect latest schema as well.
This import should go away now, right?