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.
recipe_engine:
  https://crrev.com/a161d97046d010134d81308a27b9c6490b090005 errors_test: switch to new 'test' command (phajdan.jr@chromium.org)
  https://crrev.com/88d8d807fbcd9c59be19dbb1068c63fab11b1915 Add post_process hooks to verify recipe result (phajdan.jr@chromium.org)

TBR=iannucci@chromium.org

Change-Id: I5c1c5be5761e3fc62064ff326e27a109cf14d166
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/478251
Reviewed-by: <recipe-roller@chromium.org>
Commit-Queue: <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -3,7 +3,7 @@
   "deps": {
     "recipe_engine": {
       "branch": "master",
-      "revision": "0afe202a0f678a31dd725b31268e9629ead6f20a",
+      "revision": "88d8d807fbcd9c59be19dbb1068c63fab11b1915",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },