main/linux-grsec: upgrade to 3.12.4

...evert-scripts-kallsyms-filter-symbols-not-in-kernel.patch

...et-inform-NETDEV_CHANGE-callbacks-which-flags-were-.patch

...-grsec/0002-arp-flush-arp-cache-on-IFF_NOARP-change.patch

...pv4-properly-refresh-rtable-entries-on-pmtu-redirec.patch

...pv4-rate-limit-updating-of-next-hop-exceptions-with.patch

...005-ipv4-use-separate-genid-for-next-hop-exceptions.patch

...-ipv4-use-next-hop-exceptions-also-for-input-routes.patch

main/linux-grsec/APKBUILD

main/linux-grsec/grsecurity-3.0-3.12.4-201312081754.patch

main/linux-grsec/sysctl_lxc.patch