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/4e9b50ab86b9b9f8ebf0b9ba6bd4954217ebeff9 Revert recent gclient.py changes to fix Chrome releases. (mmoss@google.com)


TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Ia0c8cba2b76d939d8e6f94dbbb836eb6d83ae594
Reviewed-on: https://skia-review.googlesource.com/129922
Commit-Queue: Recipe Roller <recipe-roller@chromium.org>
Reviewed-by: Recipe Roller <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -14,7 +14,7 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "1f156687a2014f50548eacfffb825fb4f38c44d7",
+      "revision": "4e9b50ab86b9b9f8ebf0b9ba6bd4954217ebeff9",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {