linux: update to linux-3.12.2
Merge pull request #2789 from pershoot/staging

linux: update to linux-3.12.2
linux: remove CONFIG_INET_DIAG. not used
linux: more netfilter stuff as modules..
liunux: build fuse as module
service.openelec.settings: update to service.openelec.settings-0.3.7
xf86-video-virtualbox & vboxguest: update to 4.3.4
init: update: simplify .md5 files size check