kernel.passthru: Don't include meta to be consistent with stdenv.mkDerivation

Signed-off-by: Shea Levy <shea@shealevy.com>
grsecurity: Fix build under new generic kernel derivation
grsecurity: Update stable and test patches

stable: 3.0-3.2.53-201312021727 -> 3.0-3.2.54-201401191012
test:   3.0-3.12.2-201312021733 -> 3.0-3.12.8-201401191015