linux: update to linux-3.14.4

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/RPi/patches/linux: update RPi support patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>
config/version: set version to 4.0.1

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