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/6816f322872665a9646feef369819f9c010b6ba1 vpython: Add pyOpenSSL, pull in Windows bugfix. (dnj@google.com)


TBR=iannucci@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: I75f36e47e8639732352df091a1993e72d49f496d
Reviewed-on: https://chromium-review.googlesource.com/491746
Reviewed-by: <recipe-roller@chromium.org>
Commit-Queue: <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -15,7 +15,7 @@
   "deps": {
     "recipe_engine": {
       "branch": "master",
-      "revision": "11737a0978310326dcf0607c7532ade24f696c3d",
+      "revision": "6816f322872665a9646feef369819f9c010b6ba1",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },