Add other lkgr_finder workdirs to gitignore.
Add other lkgr_finder workdirs to gitignore.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/957043003

nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra,nicko96/Chrome-Infra