add maintainers file
add maintainers file

bamboox/fluentd-pilot,AliyunContainerService/fluentd-pilot,bamboox/fluentd-pilot,BSWANG/fluent-pilot,AliyunContainerService/fluentd-pilot,bamboox/fluentd-pilot,AliyunContainerService/fluentd-pilot,bamboox/fluentd-pilot,BSWANG/fluent-pilot,BSWANG/fluent-pilot,AliyunContainerService/fluentd-pilot