cmake SYSLOG_NG_HAVE_RD_KAFKA_INIT_TRANSACTIONS examples

syslog-ng/syslog-ng modules/kafka/CMakeLists.txt :15 

check_symbol_exists (rd_kafka_init_transactions "librdkafka/rdkafka.h" SYSLOG_NG_HAVE_RD_KAFKA_INIT_TRANSACTIONS)