Previous commit turned it off by mistake.
Fixes:
89556808ef14 ("configure: Disable lex on NetBSD")
Reported-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
# cross-compiling to one of these OSes then you'll need to specify
# the correct CPU with the --cpu option.
case $targetos in
-AIX|*BSD)
+AIX|OpenBSD|NetBSD)
# Unless explicitly enabled, turn off lex.
# OpenBSD will hit syntax error when enabled.
if test -z "$disable_lex" ; then