'VERSION' is a very easy file to parse, as opposed to a header file.
We also have the benefit of holding the version information in one
very well known place and can then generate all other version texts
as we see fit, for example opensslv.h.
Fixes#10203
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/10205)
