libxml2: force ac_cv_header_ansidecl_h=no, it seems sometimes ansidecl.h is (wrongly) found

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/RPi/patches/linux: update RPi support patch, enable optional MMC_BCM2835 and MMC_BCM2835_DMA driver

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

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/Cuboxi/patches/linux: sync patches

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