[xbmc] Updated package builder file for xbmc in package mediacenter, to my version of FernetMenta/xbmc (beppec56/xbmc:master-beppe_oe-445abd8)
[xbmc] Renamed patches to use FernetMenta/xbmc (beppec56/xbmc:master-445abd8)
[xbmc] Removed xvba patch, not needed in FernetMenta/xbmc (beppec56/xbmc:master-445abd8)
[xbmc addons] Do not install OpenElec settings addon (temporary disable)
[xbmc] Set the right number of cores availables, else xbmc cannot be built
[xbmc] Removed patch already applied upstream