Roll recipe dependencies (trivial).

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

fuchsia:
  https://crrev.com/b0ec260c374b1a2de7a93eb4ddc5f92fe5b372e7 (mcgrathr@google.com)
    [gcc_toolchain] More fixes
  https://crrev.com/b51af402707105e74386da6050687db8de176378 (ihuh@google.com)
    [testing] Retry for mass test failures.

More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug.

TBR=godofredoc@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Id4b1d73dd740dba027f9018f5da87517746cc293
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/5081
Reviewed-by: 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>
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index 326900f..fb5bc33 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -33,7 +33,7 @@
     },
     "fuchsia": {
       "branch": "refs/heads/master",
-      "revision": "446a2b2d465ea8bbf9381149bdf0d3a0936d85ba",
+      "revision": "b51af402707105e74386da6050687db8de176378",
       "url": "https://fuchsia.googlesource.com/infra/recipes.git"
     },
     "recipe_engine": {