Now that we detect recusrion of sourced files, get rid of
now unused flags.

Regenerate lex.zconf.c_shipped file.
Signed-off-by: N"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Signed-off-by: NMichal Marek <mmarek@suse.cz>