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/3bd327959845d8cb93d1987b3da790a20384a1e1 Enable strict coverage for step module (phajdan.jr@chromium.org)

TBR=iannucci@chromium.org

Change-Id: I7c49190fc5fa556ad462e9a0c9b0f25bb042f5ad
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/473950
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": "05d9ed6145e2b05b7430fb7306f279fb2e2f19b2",
+      "revision": "3bd327959845d8cb93d1987b3da790a20384a1e1",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },