finder - add flexible sources port from infra/infra

When we move cros-test to infra/infra we can remove this forked code and use that as the true source

BUG=None
TEST=build

Change-Id: I6f9afb6c2b87588a4e64e2c774c7111aa246039e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/6272939
Reviewed-by: Derek Beckett <dbeckett@chromium.org>
Reviewed-by: Billy Zhao <billyzhao@chromium.org>
Tested-by: Derek Beckett <dbeckett@chromium.org>
Commit-Queue: Derek Beckett <dbeckett@chromium.org>
2 files changed