Add more Swarming babysitter buildslaves
Add more Swarming babysitter buildslaves

BUG=skia:5160

Review URL: https://codereview.chromium.org/1908003002

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot