Fix non-sense config.PreferredABI call.
Fix non-sense config.PreferredABI call.

Passing in the same config's ABIs doesn't make sense, since it's asking
"which of this list of ABIs, which are your preferred ABIs, do you prefer".
This has the same effect as passing in 'nil', which is more clear that no
outside ABI preference should be honored.

google/agi,google/agi,google/agi,google/agi,google/agi,google/agi,google/agi,google/agi