Add stumpy_moblab-paladin.
Add stumpy_moblab-paladin.

BUG=chromium:336504
TEST=cbuildbot_config_unittest.py

Change-Id: If6b2b54910969a7d627d52cf4085f73f6cc1b115
Reviewed-on: https://chromium-review.googlesource.com/184361
Reviewed-by: Peter Mayo <3d31fdaf44dc55bb1b4f50b19df9bc879177d37a@chromium.org>
Commit-Queue: Peter Mayo <3d31fdaf44dc55bb1b4f50b19df9bc879177d37a@chromium.org>
Tested-by: Peter Mayo <3d31fdaf44dc55bb1b4f50b19df9bc879177d37a@chromium.org>

bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite