xbmc: update to xbmc-648b6fc

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc: remove not working patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv into openelec-next
new project: add projects 'ARCTIC_MC'

Signed-off-by: Stephan Raue <stephan@openelec.tv>