Roll goldctl (win) from ixP2POw1d... to 6eX8c167s...

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/goldctl-win-chromium-autoroll
Please CC bsheedy@chromium.org 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/+doc/master/autoroll/README.md

Bug: None
Tbr: bsheedy@chromium.org
Change-Id: I85e324ec83076de031b3aa0fed81aa4b7de6b755
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2463785Reviewed-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@{#815824}

DEPS

@@ -1534,7 +1534,7 @@ deps = {
       'packages': [
         {
           'package': 'skia/tools/goldctl/windows-amd64',
-          'version': 'ixP2POw1dVLvzG-YPiGAJdFrTLwpr--nwyQr_S5FoRkC',
+          'version': '6eX8c167sU_avc61blSZpNkSEa5HwWNYfWCk-88QTNsC',
         },
       ],
       'dep_type': 'cipd',