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
(or complain)

recipe_engine:
  https://crrev.com/ef924b01de36ab3c70e79f7782acb3f66ffdd3fd [package.proto] Make recipe json loading forwards-compatible (iannucci@chromium.org)

TBR=iannucci@chromium.org

Change-Id: I15a9abf9b3a0b0204044abece5101760eebdb5ab
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/457979
Reviewed-by: <recipe-roller@chromium.org>
Commit-Queue: <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -4,5 +4,5 @@ deps {
   project_id: "recipe_engine"
   url: "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
   branch: "master"
-  revision: "157bae7bdfe2608d4bff84eaa90db0fdae71e26b"
+  revision: "ef924b01de36ab3c70e79f7782acb3f66ffdd3fd"
 }