[Bug other/15694] fixincl.sh bugs

[egallager at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15694

--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
Also, there's a lot of `shellcheck` output for fixincl.sh, too; should I paste
it here?