linux: Update to 3.4.74
php: Update to 5.4.23, 5.3.28

CVE-2013-4073, CVE-2013-6420
pkgs/build-support/cabal: configure a proper library rpath for dynamically linked executables
haskell-doctest: don't build haddock documentation with pre-7.4 versions of GHC
haskell-DAV: update to version 0.5.1
haskell-HsOpenSSL: update to version 0.10.3.6
haskell-ansi-terminal: update to version 0.6.1
haskell-enummapset-th: update to version 0.6.0.1
haskell-snaplet-acid-state: update to version 0.2.6
haskell-tasty: update to version 0.5.2.1
haskell-wai-test: update to version 2.0.0.1