Roll Chromite from ac74b9c703be to 7f786caa5d60 (3 revisions)

https://chromium.googlesource.com/chromiumos/chromite.git/+log/ac74b9c703be..7f786caa5d60

2020-08-25 batrapranav@chromium.org portage_util: Detect ebuild multilib_src_test()
2020-08-25 davidriley@chromium.org zork-borealis: Disable unittests for zork-borealis.
2020-08-24 geohsu@google.com Setup builders for M86 ChromeOS

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/+doc/master/autoroll/README.md

Cq-Include-Trybots: luci.chrome.try:chromeos-betty-pi-arc-chrome;luci.chromium.try:chromeos-kevin-rel
Tbr: chrome-os-gardeners@google.com
Change-Id: Id3d0111b7a83434c6e8987a56b65d2f8191e8187
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2375445Reviewed-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@{#801421}

DEPS

@@ -875,7 +875,7 @@ deps = {
 
   # Build tools for Chrome OS.
   'src/third_party/chromite': {
-      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + 'ac74b9c703be054e6f7ce1360ef02dbcd3e8b1a4',
+      'url': Var('chromium_git') + '/chromiumos/chromite.git' + '@' + '7f786caa5d60e1feec3af7913f47e632440b07da',
       'condition': 'checkout_chromeos',
   },