Roll recipe dependencies (trivial).

R=
BUG=
TBR=martiniss@chromium.org

Review URL: https://codereview.chromium.org/1724163002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298929 0039d316-1c4b-4281-b951-d872f2087c98

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: "999b0f4f51f3881017028aea6690eb2fb7588194"
+  revision: "6bce8ff78d5931559f4413d67ee33c2957139640"
 }