Manual recipe roll (trivial).

Recipe rolling is encountering difficulty, so manually roll.

BUG=None
TEST=None

Change-Id: I0f406b4fcb4b2dfc1485e881ea7893cd3267ec8e
Reviewed-on: https://chromium-review.googlesource.com/473547Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Daniel Jacques <dnj@chromium.org>

infra/config/recipes.cfg

@@ -3,7 +3,7 @@
   "deps": {
     "recipe_engine": {
       "branch": "master",
-      "revision": "86179ebcb99567b956e788bb1a100c262f533083",
+      "revision": "4e482d2131c51fd19f9a3e8840ae74c52a7b6567",
       "url": "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
     }
   },