CHANGES: mention s390x assembly pack extensions

Signed-off-by: NPatrick Steuer <patrick.steuer@de.ibm.com>
Reviewed-by: NAndy Polyakov <appro@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6870)

CHANGES

@@ -9,6 +9,11 @@
 
  Changes between 1.1.0h and 1.1.1 [xx XXX xxxx]
 
+  *) s390x assembly pack: add (improved) hardware-support for the following
+     cryptographic primitives: sha3, shake, aes-gcm, aes-ccm, aes-ctr, aes-ofb,
+     aes-cfb/cfb8, aes-ecb.
+     [Patrick Steuer]
+
   *) Make EVP_PKEY_asn1_new() a bit stricter about its input.  A NULL pem_str
      parameter is no longer accepted, as it leads to a corrupt table.  NULL
      pem_str is reserved for alias entries only.