VMS need to build DSO with name shortening, because of provider code

VMS need to build DSO with name shortening, because of provider code

We have pretty long symbol names, so they need to be shortened to fit
in the linker's 31 character limit on symbols.

Symbol name shortening with the VMS C compiler works in such a way
that a symbol name that's longer than 31 characters is mangled into
its first original 22 characters, followed by a dollar sign and the
32-bit CRC of the original symbol name in hexadecimal.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15317)