build.info: add the Perl wrapper to build generator programs on Windows

build.info: add the Perl wrapper to build generator programs on Windows

Pull request #14320 introduced the ability to use compiled programs
as generators in GENERATE rules of build.info files. Those generator
calls were wrapped by the Perl wrapper (wrap.pl) in the Unix makefile
template, but not on Windows.

This commit adds the missing wrapper for Windows, because for the
`fipsmodule.cnf` target it is essential that the `openssl fipsinstall`
command does not load any preinstalled openssl configuration file.

Fixes #13680

Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13684)