[rng] Add NIST self-tests for HMAC_DRBG

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>

src/tests/test.c

@@ -141,3 +141,4 @@ struct init_fn test_init_fn __init_fn ( INIT_NORMAL ) = {
 /* Drag in all applicable self-tests */
 REQUIRE_OBJECT ( list_test );
 REQUIRE_OBJECT ( sha1_test );
+REQUIRE_OBJECT ( hmac_drbg_test );