Update SBV to v3.1
Merge pull request #3259 from MP2E/sbv31_update

Update SBV to v3.1
conky: Link against GCC runtime library.

This is needed for Conky to shut down cleanly, because it relies on
pthread_cancel() to work.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
haskell-zippers: new expression
haskell-ghc-mod: revert a recent change I made