Configure: Recognise .rc and .def / .map / .opt as source files
This makes it possible to add build.info statements for using resource
files as well as linker scripts (.def for Windows, .map for Unix, and
.opt for VMS) is if they were source files. This requires changes in
the build file templates.
Reviewed-by: Andy Polyakov <appro@openssl.org> Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4840)