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/8753707006641351953

depot_tools:
https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/6ec5a9ab6086ec6f043cd7aab1f1744eb58b17f7
  6ec5a9a (bryner@google.com)
      New vpython3 to depot_tools.

fuchsia:
https://fuchsia.googlesource.com/infra/recipes.git/+log/450b217f4b14898a3b2cee02880033d19078cc9d~..b10eeec733c432a510e92e34f2e2e52639c0c703
  450b217 (dthorn@google.com)
      [LLDB] Add Python fix flag to BOOTSTRAP list
  b10eeec (global-integration-roller@fuchsia-infra.iam.gserviceaccount.com)
      [roll] Update 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@grotations.appspotmail.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Ignore-Freeze: Autoroller
Bugdroid-Send-Email: False
Change-Id: I1dbb81f1403e7db40cd61ddf9e1a6a3b98a1839c
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/56020
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>