gs_archive_server: add nebraska to path

Add nebraska dir, and consequently nebraska.py, to path in
gs)_archive_server executable. This is necessary for the fake omaha
implemetation.

BUG=chromium:1078188
TEST=None

Change-Id: I19294bca1ada91f5aadcf64b2b569c7f6f72f583
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2274928
Tested-by: Sanika Kulkarni <sanikak@chromium.org>
Commit-Queue: Sanika Kulkarni <sanikak@chromium.org>
Auto-Submit: Sanika Kulkarni <sanikak@chromium.org>
Reviewed-by: Congbin Guo <guocb@chromium.org>
1 file changed