Add NIST Vectors for ANSI X9.63 KDF

Source:
http://csrc.nist.gov/groups/STM/cavp/documents/components/800-135testvectors/ansx963_2001.zip

Signed-off-by: Simo Sorce <simo@redhat.com>
diff --git a/docs/development/test-vectors.rst b/docs/development/test-vectors.rst
index 1c84435..0495cc7 100644
--- a/docs/development/test-vectors.rst
+++ b/docs/development/test-vectors.rst
@@ -318,6 +318,7 @@
 * HKDF (SHA1, SHA256) from :rfc:`5869`.
 * PBKDF2 (HMAC-SHA1) from :rfc:`6070`.
 * scrypt from the `draft RFC`_.
+* X9.63 KDF from `NIST CAVP`_.
 
 Key wrapping
 ~~~~~~~~~~~~