Roll recipe dependencies (nontrivial).

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).

Please review the expectation changes, and LGTM as normal. The recipe roller
will *NOT* CQ the change itself, so you must CQ the change manually.

More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug
(or complain)

recipe_engine:
  https://crrev.com/2c474706779466f2e18e83a632f6d6debf63787f Fix issue overriding bug properties.test_api.tryserver for Gerrit. (tandrii@chromium.org)

R=tandrii@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Review-Url: https://codereview.chromium.org/2473883003

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: "fabbc26432e0ba2e5492e01640722eb4641519c9"
+  revision: "2c474706779466f2e18e83a632f6d6debf63787f"
 }

recipe_modules/bot_update/example.expected/tryjob_gerrit_angle.json

@@ -15,7 +15,7 @@
       "--gerrit_repo",
       "https://chromium.googlesource.com/angle/angle",
       "--gerrit_ref",
-      "refs/changes/89/456789/12",
+      "refs/changes/11/338811/3",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",