error: implicit declaration of function 'close_used_without_requesting_gnulib_module_close' [-Wimplicit-function-declaration]

[anlex N]

I build gettext in the Msys2 UCRT64

```shell
me@DOOR UCRT64 /e/workspace/github.com/gnu/gettext/build/make
$ grep -r close_used_without_requesting_gnulib_module_close
gettext-runtime/gnulib-lib/unistd.h:# define close close_used_without_requesting_gnulib_module_close
gettext-runtime/intl/gnulib-lib/unistd.h:# define close close_used_without_requesting_gnulib_module_close
gettext-runtime/libasprintf/gnulib-lib/unistd.h:# define close close_used_without_requesting_gnulib_module_close
gettext-tools/gnulib-lib/unistd.h:# define close close_used_without_requesting_gnulib_module_close
gettext-tools/libgrep/unistd.h:# define close close_used_without_requesting_gnulib_module_close
libtextstyle/lib/unistd.h:# define close close_used_without_requesting_gnulib_module_close
```