GitLab

This CL:
- Makes BuildConfigGenerator.groovy and fetch_all.py agree with the
expected directory of the generated DEPS file
- Fixes cipd_path computation in ParseDeps() in fetch_all.py

BUG=None

Change-Id: I13375cdec9478f196a3e026e2fc2e21197c03c28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2500564Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821041}