Tests: Fix linking on OSX
Tests: Fix linking on OSX

senior7515/librdkafka,senior7515/librdkafka,orthrus/librdkafka,janmejay/librdkafka,janmejay/librdkafka,orthrus/librdkafka,janmejay/librdkafka,senior7515/librdkafka,janmejay/librdkafka,klonikar/librdkafka,klonikar/librdkafka,klonikar/librdkafka,senior7515/librdkafka,orthrus/librdkafka,orthrus/librdkafka,klonikar/librdkafka