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/7d7746caf84d5ef3fbf8f3e3756da6328725817d [led] Update to latest version (iannucci@chromium.org)
recipe_engine:
  https://crrev.com/79676fb9a07b1192fdd4d1e1559f2b3e1eadd36b Add user_agent:recipe tag by default (sergiyb@chromium.org)


TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: I30700e2619aa111007c4b72adf4d629f1c0a2e9b
Reviewed-on: https://skia-review.googlesource.com/c/193821
Reviewed-by: Recipe Roller <recipe-roller@chromium.org>
Commit-Queue: Recipe Roller <recipe-roller@chromium.org>

infra/config/recipes.cfg

@@ -14,12 +14,12 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "b53fdae2f2dded2d6c43e4e68a43a5a73217aabf",
+      "revision": "385c9b3a3112e964d2c63e37ec9301ae77bb9636",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {
       "branch": "master",
-      "revision": "6c69f2716171819cb8d105d704ff3566632a2d6a",
+      "revision": "79676fb9a07b1192fdd4d1e1559f2b3e1eadd36b",
       "url": "https://chromium.googlesource.com/infra/luci/recipes-py.git"
     }
   },