This is a reland of e38cf570

Sinc the last reland catapult, custom-tab-client and syzygy had their origins updated
to the source of truth:
https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1043254
https://chromium-review.googlesource.com/c/chromium/tools/build/+/1043355

This fixes the last problem we had, where the origin in gclient was different from the
source of truth, and so the patch couldn't be applied.

Original change's description:
> bot_update: Patch on gclient by default.
>
> See [4] for the design doc for this change.
>
> We're moving the patching logic from bot_update to gclient.
> This way we can test patches of dependencies that modify their DEPS
> files as well, for example when ANGLE uploads a patch that modifies
> DEPS files to be tested by a Chromium trybot.
>
> Chromium Linux CQ and Angle trybots are already running this way
> (see [1] and [2]) and a PSA has already been sent [3]
>
> [1] https://chromium.googlesource.com/chromium/src/+/master/infra/config/global/cr-buildbucket.cfg#214
> [2] https://chromium.googlesource.com/angle/angle/+/infra/config/cr-buildbucket.cfg#105
> [3] https://groups.google.com/a/google.com/forum/#!topic/chrome-infra/FVHN2kdUX4I
> [4] https://docs.google.com/document/d/1GSTw4ysm5AYjNR6vMA7NJUxLK2VN9IpOEp_v0u-wyOE/edit?ts=5ad78165#
>
> Bug: 643346
> Change-Id: Ic9a9dcfae86aca730d35fbb26c26b21135e05bf3
> Recipe-Nontrivial-Roll: skia
> Recipe-Nontrivial-Roll: infra
> Recipe-Nontrivial-Roll: build_limited_scripts_slave
> Recipe-Nontrivial-Roll: skiabuildbot
> Recipe-Nontrivial-Roll: build
> Recipe-Nontrivial-Roll: release_scripts
> Reviewed-on: https://chromium-review.googlesource.com/1014356
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
> Reviewed-by: Aaron Gable <agable@chromium.org>

Bug: 643346

Change-Id: Ia0db591c6bf9695f56e6b71777c567595986a511
Reviewed-on: https://chromium-review.googlesource.com/1031206
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Aaron Gable <agable@chromium.org>