Merge remote-tracking branch 'remotes/berrange/tags/pull-qcrypto-2016-12-21-2' into staging

Merge qcrypto 2016/12/21 v2

# gpg: Signature made Thu 22 Dec 2016 10:46:17 GMT
# gpg:                using RSA key 0xBE86EBB415104FDF
# gpg: Good signature from "Daniel P. Berrange <dan@berrange.com>"
# gpg:                 aka "Daniel P. Berrange <berrange@redhat.com>"
# Primary key fingerprint: DAF3 A6FD B26B 6291 2D0E  8E3F BE86 EBB4 1510 4FDF

* remotes/berrange/tags/pull-qcrypto-2016-12-21-2:
  crypto: add HMAC algorithms testcases
  crypto: support HMAC algorithms based on nettle
  crypto: support HMAC algorithms based on glib
  crypto: support HMAC algorithms based on libgcrypt
  crypto: add HMAC algorithms framework
  configure: add CONFIG_GCRYPT_HMAC item
  crypto: add 3des-ede support when using libgcrypt/nettle
  cipher: fix leak on initialization error

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>