nettle: add patch to support out-of-tree builds

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

Signed-off-by: Stephan Raue <stephan@openelec.tv>
nettle: add patch to fix pkgconfig file, so gnutls is finding all nettle headers

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

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-driver: update to bcm2835-driver-e2b77f9

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-bootloader: update to bcm2835-bootloader-e2b77f9

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

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-bootloader: update to bcm2835-bootloader-02eed2f

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-driver: update to bcm2835-driver-02eed2f

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