[COMMANDS] Added crc32 to memory cmd

Signed-off-by: Anup Patel <anup@brainfault.org>
[CORE] net: Improve slab based allocator for mbuf external storage

Signed-off-by: Anup Patel <anup@brainfault.org>
Merge remote-tracking branch 'upstream/master' into dev_exynos4