[test] Avoid using "static const" for test declarations
gcc will not warn about unused constant static variables. An unused
test declaration is almost certainly a bug, so ensure that warnings
are generated.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
NIST provides a set of known-answer tests for the HMAC_DRBG algorithm,
which can be used as part of the conformance testing for ANS X9.82.
Signed-off-by: Michael Brown <mcb30@ipxe.org>