-Make generated build tasks for Pixelbook use Debian9...Docker and rename those in jobs.json
---Non-Pixelbook ChromeOS build tasks now use regular Debian10, as they seem to handle it fine.
---Removed 2 Build-Debian9-Clang-arm-.*-Chromebook_GLES jobs, since they are now unused.
-Added docker logic to chromebook.py, refactored to handle the differing directory structure (TODO to simplify)
---Added docker-chromeos-compile.sh to run in the container.
---util function to convert to string that can be used in the python or passed to bash (cribbed from docker.py, will consolidate in later CL)
-Prerequisite for upgrading the last 10% of the fleet to Debian10
Bug: skia:9438
Change-Id: I0727aad2d00383e568ddbeea98d56d42bcca26e5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/282678
Commit-Queue: Weston Tracey <westont@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
