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/71848f7add95e74692387c3feadaee93e185169d [autoroll] exclude recipes_simulation_test stdout from non-verbose json. (iannucci@chromium.org)

TBR=iannucci@chromium.org

Change-Id: I07f0e821dbaed7771cf5bf796083ae98bc084c8a
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/479051
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": "b7cd5ee1ea736116d35559ff0e2fb61081d1ca01",
+      "revision": "71848f7add95e74692387c3feadaee93e185169d",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },