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.
depot_tools:
  https://crrev.com/6ec6d27f2d1bd3d46eddaf469ee21cacc3e04999 [led] Update to f8fd394bd671f4cf4da8064a1ee074018c275d15. (iannucci@chromium.org)
  https://crrev.com/ca7d881540e391fc1b5aa44d08c08a67e0b1a797 Reland "Reland "gclient_scm: Use cherry-picking instead of rebasing."" (ehmaldonado@chromium.org)


TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Ic64eeb4ded47104f0432147cec0e59a317d47f59
Reviewed-on: https://skia-review.googlesource.com/143115
Reviewed-by: Recipe Roller <recipe-roller@chromium.org>
Commit-Queue: Recipe Roller <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -14,7 +14,7 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "5ba1e9caeecb40a6ec7cc045e6850dbe65f79446",
+      "revision": "ca7d881540e391fc1b5aa44d08c08a67e0b1a797",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {