sane-backends: Add extra source url

It seems alioth.debian.org has some problem (login needed for download), so
I've added a pkgs.fedoraproject.org url.
obnam: Update to 1.6.1
mkpasswd: Update to 5.1.1
ghc: Fix building on Darwin

http://hydra.nixos.org/build/8598783
llvm-3.4: Only build on Linux

It doesn't build on Darwin because it depends on Valgrind:
http://hydra.nixos.org/build/8616143/nixlog/1/raw
python-3.3: Only build on Linux

It doesn't build on Darwin: http://hydra.nixos.org/build/8597946
Add annotated-wl-pprint haskellPackage

Signed-off-by: Shea Levy <shea@shealevy.com>
gupnp-tools and releated packages: fix and update
Add version numbers to name and remove comment
Use version variables for easier upgrading
libsoup: Run patchShebangs
Remove libsoup_2_44
Remove left-over reference to libsoup_2_44
Merge pull request #1496 from bennofs/fix-gupnp-tools

gupnp-tools and releated packages: fix and update