Roll recipe dependencies (trivial).

This is an automated CL created by the recipe roller. This CL rolls recipe
changes from upstream projects (depot_tools) into this repository.

depot_tools:
  https://crrev.com/4dc5b7792fe10298a379e3d46e4693a7bdb03f1d (ehmaldonado@chromium.org)
    git-cl: Fix split branch name
  https://crrev.com/7c34a225375d758beb8225e2171fcd3c031f0e8c (ehmaldonado@chromium.org)
    git-cl: Fix Change object construction for git-cl split

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

TBR=borenet@google.com

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: I0e1b70629ea0ccaac69d7a8501987c9c01d4daac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/272697
Reviewed-by: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>

infra/config/recipes.cfg

@@ -14,7 +14,7 @@
   "deps": {
     "depot_tools": {
       "branch": "master",
-      "revision": "1eb16f67982b134323bd89c9f639ba1908700b88",
+      "revision": "7c34a225375d758beb8225e2171fcd3c031f0e8c",
       "url": "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
     },
     "recipe_engine": {