Merge remote branch 'tpruvot/busybox_1_23' into cm-1.23

Conflicts:
	Makefile
	findutils/grep.c
	modutils/modprobe-small.c
	networking/ping.c
	networking/wget.c
	shell/ash.c
	testsuite/grep.tests
	util-linux/swaponoff.c

Change-Id: Ic5b6b33eb30c71710fc56cf92ec9506d55814cbc
android: add missing mempcpy function

Change-Id: I9ae3f0820825d1b1ae37c505d535819452e02c53
update config for 1.23

busybox-full: add ping6, whois and arping, fatattr

Change-Id: Icb9ea03a1003d9341f0480ad82b70edaf323f57e