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
(or complain)

build:
  https://crrev.com/78cf0106e44c8f170c6c9a629f2cf960f95bd18d Roll recipe dependencies (trivial). (recipe-roller@chromium.org)
depot_tools:
  https://crrev.com/fad941ba3df121c0e5907f0583ff2102d0612f4a Add env variable to skip GceAuthenticator for Gerrit CLs (rmistry@google.com)

TBR=martiniss@chromium.org,phajdan.jr@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Review-Url: https://codereview.chromium.org/2504203002
Cr-Commit-Position: refs/heads/master@{#432468}

infra/config/recipes.cfg

@@ -5,13 +5,13 @@ deps {
   project_id: "build"
   url: "https://chromium.googlesource.com/chromium/tools/build.git"
   branch: "master"
-  revision: "cc9e2b1b6d012534d499471550ea9bb5618ea785"
+  revision: "78cf0106e44c8f170c6c9a629f2cf960f95bd18d"
 }
 deps {
   project_id: "depot_tools"
   url: "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
   branch: "master"
-  revision: "260ab401aa0bce98a1c8a38d4f6dd4f79636c3a3"
+  revision: "fad941ba3df121c0e5907f0583ff2102d0612f4a"
 }
 deps {
   project_id: "recipe_engine"