Fix bootability check to parse -f and ignore kernel-builtin modules

mkinitrd_command_generator often emits no -m and relies on -f for the
root filesystem, so the module check silently skipped. Parse -f as well
and drop any name listed in modules.builtin.

Also fix the parser itself: two greps inside a { } group share one stdin
stream, so the second grep saw EOF and returned nothing. Replaced with a
single awk pass.

0 files changed, 0 insertions, 0 deletions