systemd: add hwdb.service
linux: drm/radeon: use sw CTS/N values for audio on DCE4+

thanks @fritsch
systemd: cleanup hwdb.d/
systemd: user hwdb.d: add README
xf86-video-intel: update to xf86-video-intel-2.99.905

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
busybox: export $DEBUG
busybox: cleanup /etc/profile
systemd: symlink /sbin/udevadm
bluez: fix hid2hci
connman: disallow updates to hostname
Virtual: enable uvesafb. disable lcdproc/afpfs/etc.. nonsense
Virtual: re-add mysql support
remove package: cryptodev-linux
drivers*: trigger a full rebuild on *any* kernel change
dvbhdhomerun: trigger a full rebuild on *any* kernel change

ups. forgot this one in previous commit ;)
update TODO
drivers*: trigger a full rebuild also on meta/package.mk change
update TODO
buildsystem: add 'post_unpack'

this is built-in PKG_DIR/rename replacement