Set the paladin builder name for the amd64 CQ.
Set the paladin builder name for the amd64 CQ.

This setting modifies the default builder name to something else
if it differs from the config name.

BUG=chromium-os:24864
TEST=cbuildbot_config_unittest

Change-Id: Iec92221a4a964ef6390be36f06a0f04e4cd4a0f9
Reviewed-on: https://gerrit.chromium.org/gerrit/13906
Commit-Ready: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Tested-by: Chris Sosa <959d3d631fb6f17f1b07f751372041a1edb210d1@chromium.org>
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Reviewed-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

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