xbmc: update ffmpeg patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xbmc: update to xbmc-13.alpha-4e698ae

Signed-off-by: Stephan Raue <stephan@openelec.tv>
u-boot: update to u-boot-imx6-cuboxi-efc4835

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv