Ruby: missing Directory Reference

Ruby 3.4.7p58 (2025-10-08 revision 7a5688e2a27668e48f8d6ff4af5b2208b98a2f5e)

missing Directory Reference

## Files
| acosh.c
| alloca.c
| cbrt.c
| close.c
| crt_externs.h
| crypt.c
| crypt.h
| des_tables.c
| dtoa.c
| erf.c
| explicit_bzero.c
| ffs.c
| file.h
| flock.c
| hypot.c
| langinfo.c
| lgamma_r.c
| memcmp.c
| memmove.c
| mt19937.c
| nan.c
| nextafter.c
| procstat_vm.c
| setproctitle.c
| strchr.c
| strerror.c
| strlcat.c
| strlcpy.c
| strstr.c
| tgamma.c