haskell-generic-deriving: update to version 1.6.1
haskell-profunctor-extras: update to version 3.3.3.1
haskell-reactive-banana: update to version 0.7.1.3
haskell-stm-conduit: update to version 2.1.1
haskell-unix-process-conduit: update to version 0.2.2
haskell-unix-time: update to version 0.2.0
haskell-lens: jailbreak to fix build with latest version of generic-deriving
haskell-idris: revert update to version 0.9.9

This reverts commit 61c880d5582c9bfd91a4ddb9c27973e31aed8c12. The new
Idris version depends on a version of LLVM that we don't have in master
yet: it's only in x-updates.
bison3: mark low-prio until the check phase is fixed
xorg: bugfix updates of some libs

Now using stable release of libXi, instead of the git version we had due
to security stuff.
lightdm updates (merge #574)

Also fixes the situation where some session stuff is written to nix store.
add introspection into GTK libs (part of #517)

This is all work of Marc Weber <marco-oweber@gmx.de>, except for a few nitpicks.

Tested space blowup: IMHO negligible to headers and similar stuff,
e.g. the firefox closure (reported by du) grows from 560 to 579 MB.
Saving space should be handled separately,
e.g. we have the multiple-outputs branch.
iodined: Fix iptables and route path to bin instead of sbin
Merge pull request #801 from offlinehacker/iodined

iodined: Fix iptables and route path to bin instead of sbin
haskell-git-annex: update to version 4.20130802
haskell-MissingH: update to version 1.2.0.1

Don't run the check phase to avoid depending on the obsolete testpack package.
haskell-numeric-prelude: update to version 0.4.0.3
haskell-shakespeare: update to version 1.0.5.1
haskell-stylish-haskell: update to version 0.5.7.0
Make iPhone simulator SDKs configurable