Camellia support

[Simon Josefsson]

Libgcrypt 1.3.0 supports the Camellia cipher, that GnuTLS can use, so I
installed a gnulib module for gc-* to use it.

http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=2d6501c921265a1536ca044f45773e761b639706

/Simon