Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls
recipe changes from upstream projects (depot_tools, fuchsia) into this repository.

The build that created this CL was
https://ci.chromium.org/b/8684995785004674545

depot_tools:
https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/bf968bc99c08ccf040a3297fb0e83daf644f09c5~..cce6753da6f06f78c6228468d69b78181b6170eb
  bf968bc (ziwlin@microsoft.com)
      [Depot Tools] Include skill_validator.py in recipe bundle
  cce6753 (jwata@google.com)
      Reland "siso: Set --namespace flag to "ninja" subcommand"

fuchsia:
https://fuchsia.googlesource.com/infra/recipes.git/+/7d4f91c0ab5f1dcffc3df851ed75c68f30ca7d59
  7d4f91c (global-integration-roller@fuchsia-infra.iam.gserviceaccount.com)
      [roll] Update coverage pinned tools

Please check the following references for more information:
- autoroller, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/workflow.md#autoroller
- rollback, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/workflow.md#rollback
- cross-repo dependencies, https://chromium.googlesource.com/infra/luci/recipes-py/+/main/doc/cross_repo.md

Use https://goo.gl/noib3a to file a bug.

R=flutter-infra-notify+luci-recipes@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Ignore-Freeze: Autoroller
Bugdroid-Send-Email: False
Change-Id: I4d882ea8bfdeb9e6c2506cc38e2b600cc02e1df2
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/77361
Commit-Queue: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>