OWNERS: switch to shared owners repo

BUG=None
TEST=CQ passes

Change-Id: I67f2ee45d999f0235a7e2a3e0619c774f76093c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/portage_tool/+/3888242
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Sloan Johnson <sloanjohnson@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Sloan Johnson <sloanjohnson@google.com>
1 file changed