libdrm: update to libdrm-2.4.46

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Mesa: fix install of llvm

Signed-off-by: Stephan Raue <stephan@openelec.tv>
linux: add and update new radeon firmwares

Signed-off-by: Stephan Raue <stephan@openelec.tv>
busybox: save longer lofiles and rotate much more in debug mode

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/Generic_OSS: use fullsize splash with KMS support

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