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/40a0e58e42217e0d5249897487d6f2a9cf423bc9 remove use_subprocess42 flag for good (iannucci@chromium.org)

TBR=martiniss@chromium.org,phajdan.jr@chromium.org

Change-Id: I34ab9ae948095a0a1c1304f531d2bf6a3281d122
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/446536
Reviewed-by: <recipe-roller@chromium.org>
Commit-Queue: <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -5,5 +5,5 @@ deps {
   project_id: "recipe_engine"
   url: "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
   branch: "master"
-  revision: "fd54405ae7498eddf828c022f53726a7dca1c9ed"
+  revision: "40a0e58e42217e0d5249897487d6f2a9cf423bc9"
 }