Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls recipe
changes from upstream projects (e.g. depot_tools) into downstream projects
(e.g. tools/build).


More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug.
depot_tools:
  https://crrev.com/b4a587df5e348bddb26ea1bb6a5013f1e854b3a8 depot_tools: Remove depot-tools-auth (ehmaldonado@chromium.org)
recipe_engine:
  https://crrev.com/47a94f44d8b345593510faf052494627c69c5c44 [buildbucket] Let child builds use builder priority (olivernewman@google.com)


TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Ia33565d510b5e91af710d33378d5e426feaa6a0d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/247524
Reviewed-by: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index 0bb5570..5b62b3f 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -14,12 +14,12 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "71681bf1e84a4829521cb8a33b7c3331d46580b8",
+      "revision": "3481902904a9e103f8391bc5e17385f537cadbab",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {
       "branch": "master",
-      "revision": "1cc8317a701750c47ac3fe5183af8e105f9c36bc",
+      "revision": "47a94f44d8b345593510faf052494627c69c5c44",
       "url": "https://chromium.googlesource.com/infra/luci/recipes-py.git"
     }
   },