Fixing libotr crash (taking a 3rd party patch)

I hope it doesn't make libotr insecure, but the trivial patch comes from
this irssi-otr thread:
https://github.com/cryptodotis/irssi-otr/issues/21
freetype: attempt to fix build for the other FreeBSD
vala: attempt to fix on FreeBSD
linux-3.0: upgrade to 3.0.73
linux-3.4: upgrade to 3.4.40
linux-3.8: upgrade to 3.8.7
some libintl and libiconv cleanups + non-linux fixes
meta.license should be a (list of) string(s), not an attribute set

http://hydra.nixos.org/build/4744513
git-annex: drop obsolete dependency on testpack
haskell-testpack: drop obsolete and unmaintained library
nbd: update to version 3.3
haskell-split: update to version 0.2.2
haskell-github-backup: update to version 1.20130414
haskell-happstack-server: update to version 7.1.7.1
haskell-statistics: update to version 0.10.3.0
haskell-cuda: update to version 0.5.0.2
haskell-statistics: patch to fix Haddock build
Adding libffi to autogen dependencies to fix the build