Euan Kemp fd2872a88a dev_image_util: hardcode correct portage binhost
We already hardcode similar urls a bit below (the sync-uri).

Not hardcoding the binhost results in an incorrect value during
embargoed build uploads.
2017-10-25 13:02:10 -07:00
..
2017-05-25 11:38:14 -07:00