Added ZRAM Tweaked with Google's "Snappy" Compression/Decompression (Thx
Faux123) + other cleancache tweaks
	modified:   drivers/staging/Kconfig
	modified:   drivers/staging/Makefile
	new file:   drivers/staging/snappy/Kconfig
	new file:   drivers/staging/snappy/Makefile
	new file:   drivers/staging/snappy/csnappy.h
	new file:   drivers/staging/snappy/csnappy_compress.c
	new file:   drivers/staging/snappy/csnappy_decompress.c
	new file:   drivers/staging/snappy/csnappy_internal.h
	modified:   drivers/staging/zcache/zcache-main.c
	modified:   drivers/staging/zram/Kconfig
	modified:   drivers/staging/zram/zram_drv.c
	modified:   include/linux/page-flags.h
	modified:   mm/ashmem.c
	modified:   mm/vmscan.c