On z/OS, allow charset tagging of temporary shell scripts.

Reported by Mike Fulton <mikefultonpersonal@gmail.com> in
<https://lists.gnu.org/archive/html/bug-gnu-libiconv/2023-05/msg00002.html>.

* lib/genaliases.c (BINARY_MODE): New macro.
(main): Use it instead of "b".
2 files changed