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

Pull request openssl#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 openssl#13680

Reviewed-by: Tomas Mraz <[email protected]>
(Merged from openssl#13684)

Configurations/windows-makefile.tmpl

@@ -789,8 +789,8 @@ EOF
           # Also redo $gen0, to ensure that we have the proper extension.
           $gen0 = platform->bin($gen0);
           return <<"EOF";
-$args{src}: $gen0 $deps
-	$gen0$gen_args > \$@
+$args{src}: $gen0 $deps "\$(BLDDIR)\\util\\wrap.pl"
+	"\$(PERL)" "\$(BLDDIR)\\util\\wrap.pl" $gen0$gen_args > \$@
 EOF
       } else {
           #