[recipes] manual roll and fix unicode.

Again, utf-8 encoded strings are the good thing to do in python2 :D

BUG=

Change-Id: I693a726f8407ea2ea135994ce6f49df76976e559
Reviewed-on: https://chromium-review.googlesource.com/440474
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

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: "bab22ae9b2fb5541bee4cb60136a3c562f7a7fe9"
+  revision: "c3ddb15b9b5dabf3622e526b459914449f25cc36"
 }

recipe_modules/git_cl/example.py

@@ -15,7 +15,7 @@ DEPS = [
 
 
 def RunSteps(api):
-  api.git_cl.upload(u"Do the thing foobar\nNow with emoji: 😄")
+  api.git_cl.upload("Do the thing foobar\nNow with emoji: 😄")
   api.git_cl.issue()
   result = api.git_cl.get_description(
       patch='https://code.review/123', codereview='rietveld', suffix='build')