slub: Fix Warning

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>
Fix derps

Signed-off-by: kykdev <kykint@naver.com>
build.sh: Compress ramdisk before boot.img

Signed-off-by: kykdev <kykint@naver.com>
Use prebuilt lz4 binary

Signed-off-by: kykdev <kykint@naver.com>