Add test which uses an expired cert but is otherwise OK, which
passes if and only if MBEDTLS_HAVE_TIME_DATE is not set.
Add similar test which verifies against a different data file,
which must fail regardless of MBEDTLS_HAVE_TIME_DATE.
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
f8565b3c2b