Roll src/third_party/chromite 6ce64248fdc9..57a5b927de7d (2 commits)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/6ce64248fdc9..57a5b927de7d

git log 6ce64248fdc9..57a5b927de7d --date=short --no-merges --format='%ad %ae %s'
2019-10-04 vapier@chromium.org failures_lib: rework handling of Exception.message
2019-10-04 vapier@chromium.org infra_libs: drop unused imports

Created with:
  gclient setdep -r src/third_party/chromite@57a5b927de7d

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: Ic42ffc7359bf31e907990a52750df3a7ed22772b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1842401Reviewed-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@{#703111}

DEPS

@@ -862,7 +862,7 @@ deps = {
 
   # Build tools for Chrome OS. Note: This depends on third_party/pyelftools.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '6ce64248fdc99c4b475d18f3609ae4f5342e07dd',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '57a5b927de7d15a06145c40e96555541266ce84e',
       'condition': 'checkout_linux',
   },