Roll src/third_party/chromite 720447713e24..e8378a666b73 (4 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/720447713e24..e8378a666b73

git log 720447713e24..e8378a666b73 --date=short --no-merges --format='%ad %ae %s'
2019-10-23 vapier@chromium.org loas: use encoding=utf-8 for commands
2019-10-23 vapier@chromium.org paygen: replace gspaths._RandomString with cros_build_lib.GetRandomString
2019-10-23 kimjae@chromium.org osutils: CopyDirContent needs to copy symlinks like copytree symlinks
2019-10-23 saklein@chromium.org gen_call_scripts: Add board option.

Created with:
  gclient setdep -r src/third_party/chromite@e8378a666b73

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
TBR=chrome-os-gardeners@google.com

Bug: None
Change-Id: I7501664600a8e145ba3cb1fcfdbf4335fc71c431
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1875659Reviewed-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@{#708849}

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' + '@' + '720447713e2441342aa859697b823e3761228c5a',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + 'e8378a666b734700965bd7c808064f5c3a09806f',
       'condition': 'checkout_linux',
   },