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/8682047603879987217

depot_tools:
https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/7b46edbbedc92d910a485815c2499d74254b4f74
  7b46edb (wnwen@google.com)
      Add EPL-2.0 to allowlist

fuchsia:
https://fuchsia.googlesource.com/infra/recipes.git/+/6caee531c054bd5ce80011ff1997bbd373737d71
  6caee53 (ihuh@google.com)
      [fuchsia/build] Only set cipd_ref property if not null.

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: I43432e03a25492565ef5664e7bfc9d1ee479649c
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/78840
Bot-Commit: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com <flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com>