Roll recipe dependencies (trivial).

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

depot_tools:
  https://crrev.com/3d37f4f72c61dcbc0cb2ac4d9c883803a6364e5f (jbudorick@chromium.org)
    Revert "cros: switch CrOS programs to python3"

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

TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Ifa6ada0e67c3a25d90b8270ff4d0b7c3ebd9c3d7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/270476
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>

Author: recipe-roller

infra/config/recipes.cfg

@@ -14,7 +14,7 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "35b70cac56392e080407200c62a0818b2aa1b3ce",
+      "revision": "3d37f4f72c61dcbc0cb2ac4d9c883803a6364e5f",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {