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/96e1d788304830a9e405925d3c0a38953502558c gclient flatten: add support for hooks_os (phajdan.jr@chromium.org)
  https://crrev.com/aee6c8527222f719c55eb9d3e1dcdd6bcd808e95 git-cl-issue: respect --gerrit/--rietveld with integer argument (agable@chromium.org)
recipe_engine:
  https://crrev.com/097a0dbe9f6b8eae39e690de848aea5c3d8ea38b [test] minor refactoring. (iannucci@chromium.org)


TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Ic6d97eeb4356ca28e0f3c6e507616b96cc6dfad6
Reviewed-on: https://skia-review.googlesource.com/20973
Reviewed-by: Recipe Roller <recipe-roller@chromium.org>
Commit-Queue: Recipe Roller <recipe-roller@chromium.org>
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index 82ae087..6c65daf 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -14,12 +14,12 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "3e87c1ba290d0d7045e82f9ca451a5dd9f5ba1c7",
+      "revision": "c881b9db2d00a0b377ade12e7894ab3a4567b4b1",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {
       "branch": "master",
-      "revision": "8c0fd220f89fdee4865b016def85a4ad8d04fec5",
+      "revision": "097a0dbe9f6b8eae39e690de848aea5c3d8ea38b",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },