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/b7b68b4c0396453d775c7fb924d45bbfdff6f349 Updating perf recipe for disabled chartjson data. (eyaich@chromium.org)

TBR=martiniss@chromium.org,phajdan.jr@chromium.org
BUG=chromium:647714

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Review-Url: https://codereview.chromium.org/2373793002
Cr-Commit-Position: refs/heads/master@{#421192}

infra/config/recipes.cfg

@@ -5,7 +5,7 @@ deps {
   project_id: "build"
   url: "https://chromium.googlesource.com/chromium/tools/build.git"
   branch: "master"
-  revision: "3e51f3b4787dcc251a4d751572e1c1fd234e874a"
+  revision: "b7b68b4c0396453d775c7fb924d45bbfdff6f349"
 }
 deps {
   project_id: "depot_tools"