Roll src/third_party/chromite/ de4d8e323..267bf6a6b (7 commits).

roll-dep src/third_party/chromite chromiumos/chromite.git

https://chromium.googlesource.com/chromiumos/chromite.git/+log/de4d8e3236c7..267bf6a6bbd0

$ git log de4d8e323..267bf6a6b --date=short --no-merges --format='%ad %ae %s'
2016-12-08 laszio Add chell-chrome-pfq to waterfall.
2017-01-07 laszio afdo: fix a python syntax problem
2017-01-06 laszio afdo: initialize gsurls before using it in AFDOUpdateEbuildStage
2016-12-02 vapier patch: handle gerrit results that omit http/https results
2016-09-22 aaboagye Paygen: Split up Paygen into Build + Test stages.
2016-11-23 achuith cros_run_vm_test: --vm-sanity for running vm_sanity.py.
2016-11-01 dgarrett bootstrap: Create script to launch cbuildbot on branch.

BUG=

Review-Url: https://codereview.chromium.org/2626803002
Cr-Commit-Position: refs/heads/master@{#442725}

DEPS

@@ -408,7 +408,7 @@ deps_os = {
 
     # Build tools for Chrome OS. Note: This depends on third_party/pyelftools.
     'src/third_party/chromite':
-      Var('chromium_git') + '/chromiumos/chromite.git' + '@' + 'de4d8e3236c7b705c4577f8162183990abb0b570',
+      Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '267bf6a6bbd075136ddde7f74c320c7acc073314',
 
     # Dependency of chromite.git and skia.
     'src/third_party/pyelftools':