bootstrap: Dont require libyajl to build.
bootstrap: Dont require libyajl to build.

yiliaofan/kafkacat,slimhazard/kafkacat,wikimedia/operations-debs-kafkacat,slimhazard/kafkacat,imcom/kafkacat,pugna0/kafkacat,wikimedia/operations-debs-kafkacat,yiliaofan/kafkacat,pugna0/kafkacat,imcom/kafkacat