[Clfs-support] Flex not found config error on CLFS 7.12 boot method

[Andrew Reyes]

Hello again guys trying again the multilib build and got passed the 
e2fsprog section on the boot method. I'm now hung up at the grub install 
of the CLFS multilib build section 7.12. It's giving me a config error: 
flex not found. Am I missing a symlink somewhere?