slab & slob from linux 3.4.y
fix some mistakes

Conflicts:
	Documentation/vm/slub.txt

Change-Id: I13c3275b8bab09410251279edad84c357e5999e5
update slab to linux 3.5.7
add back CONFIG_GPU_OC

Conflicts:
	arch/arm/Kconfig

Change-Id: I2f9d2c05530a0df00211f6c14ff1c654b8102b9a