Roll src/third_party/chromite 8cf4a76817cb..c7796cf40d5e (7 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/8cf4a76817cb..c7796cf40d5e

git log 8cf4a76817cb..c7796cf40d5e --date=short --first-parent --format='%ad %ae %s'
2020-03-11 vapier@chromium.org gerrit: rewrite helpers to use classes
2020-03-11 saklein@chromium.org build_target_util: Rename to build_target_lib.
2020-03-11 vapier@chromium.org git_metrics: have git commands return strings
2020-03-10 tbegin@google.com packages: add termina VMs to versioned package uprev
2020-03-10 saklein@chromium.org commandline: Add build_target argument type support.
2020-03-10 vapier@chromium.org export_to_gcloud: fix some python3 unittest logic
2020-03-10 kcwu@chromium.org cros_chrome_sdk: fix goma install using python3

Created with:
  gclient setdep -r src/third_party/chromite@c7796cf40d5e

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/chromite-chromium-autoroll
Please CC chrome-os-gardeners@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:chromeos-kevin-rel
Bug: None
Tbr: chrome-os-gardeners@google.com
Change-Id: I51e30138a7d72c632be9937e8aab2c80a5e3e975
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2098237Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#749217}

DEPS

@@ -874,7 +874,7 @@ deps = {
 
   # Build tools for Chrome OS. Note: This depends on third_party/pyelftools.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '8cf4a76817cbc62ad4e47a230978355a79840009',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + 'c7796cf40d5ee7694c8d8abe91d4ee1023444bd8',
       'condition': 'checkout_linux',
   },