Add Flex options to fix -Wall warnings
Add Flex options to fix -Wall warnings

rlei/fastd-android,fpletz/fastd,rlei/fastd-android,rlei/fastd-android,fpletz/fastd,fpletz/fastd,fpletz/fastd,rlei/fastd-android,rlei/fastd-android,fpletz/fastd