Add fox builders.
Add fox builders.

BUG=chrome-os-partner:18036
TEST=unittests

Change-Id: I93e6e7cfaf2e535900008d0995af3fa21c0343f5
Reviewed-on: https://gerrit.chromium.org/gerrit/44667
Commit-Queue: Peter Mayo <3d31fdaf44dc55bb1b4f50b19df9bc879177d37a@chromium.org>
Reviewed-by: Peter Mayo <3d31fdaf44dc55bb1b4f50b19df9bc879177d37a@chromium.org>
Tested-by: Peter Mayo <3d31fdaf44dc55bb1b4f50b19df9bc879177d37a@chromium.org>

bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,zhang0137/chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,coreos/chromite,chadversary/chromiumos.chromite,coreos/chromite