[Bug bootstrap/104217] gcc-12-20220123 failure to build on Cygwin due to lack of secure_getenv

[mckelvey at maskull dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104217

--- Comment #2 from James McKelvey <mckelvey at maskull dot com> ---
Builds with gcc-11-20220122.