VMS fix of test/recipes/80-test_ssl_new.t

On VMS, file names with more than one period get all but the last get
escaped with a ^, so 21-key-update.conf.in becomes 21-key-update^.conf.in
That means that %conf_dependent_tests and %skip become useless unless
we massage the file names that are used as indexes.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2678)