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/0497d326e1805715e8df4095afa6d0e95b9af48f Revert of Assert validity of stream parameters. (patchset #4 id:60001 of https://codereview.chromium.org/2792333003/ ) (phajdan.jr@chromium.org)
  https://crrev.com/ab1007e993f5ae367c15389afb954591bf3376dd autoroll: don't send output from "fetch" command to NUL (phajdan.jr@chromium.org)

TBR=iannucci@chromium.org

Change-Id: Ia5536063fb3bbd243b66b31f418c3b2e9b08c4ef
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/471566
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": "e2b4fd5362e043dc66e85f5c342e414c5bfb89de",
+      "revision": "ab1007e993f5ae367c15389afb954591bf3376dd",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },