Android ZRAM Optimizations: adapted from Samsung JF series kernel

Signed-off-by: Paul Reioux <reioux@gmail.com>
	modified:   arch/arm/kernel/process.c
	modified:   drivers/staging/android/lowmemorykiller.c
	modified:   include/linux/sched.h
	modified:   kernel/cgroup.c
	modified:   kernel/sched/core.c
	modified:   mm/memcontrol.c
	modified:   mm/shmem.c
	modified:   mm/vmscan.c