devserver: Fix a ton of preupload hook complains

Also deprecate the use of paygen.gspath as its use was incorrect anyway.

BUG=none
TEST=start_devserver

Change-Id: I324260e439d089aca418e7274fff225b2ffe4a25
Reviewed-on: https://chromium-review.googlesource.com/1640960
Tested-by: Amin Hassani <ahassani@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
1 file changed