Merge remote-tracking branch 'remotes/elmarco/tags/rm-libcacard' into staging

Merge remote-tracking branch 'remotes/elmarco/tags/rm-libcacard' into staging

Remove libcacard

# gpg: Signature made Wed 23 Sep 2015 22:37:11 BST using RSA key ID 75969CE5
# gpg: Good signature from "Marc-André Lureau <[email protected]>"
# gpg:                 aka "Marc-André Lureau <[email protected]>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* remotes/elmarco/tags/rm-libcacard:
  libcacard: use the standalone project

Signed-off-by: Peter Maydell <[email protected]>