VMS: Fix internals test programs

The internals test programs access header files that aren't guarded by
the public __DECC_INCLUDE_PROLOGUE.H and __DECC_INCLUDE_EPILOGUE.H files,
and therefore have no idea what the naming convention is.  Therefore, we
need to specify that explicitely in the internals test programs, since
they aren't built with the same naming convention as the library they
belong with.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3247)