Merge branch from toybox/master

Merge branch from toybox/master
Conflicts:
	both modified:      lib/portability.c
	both modified:      lib/portability.h
	both modified:      scripts/genconfig.sh
	both modified:      scripts/runtest.sh
	both added:         tests/sed.test
	both modified:      toys/other/acpi.c
	both modified:      toys/other/ifconfig.c
	deleted by them:    toys/other/unshare.c
	both added:         toys/pending/hwclock.c
	both modified:      toys/pending/ip.c
	deleted by them:    toys/pending/sed.c
	both modified:      toys/posix/chgrp.c
	both modified:      toys/posix/cp.c
	both modified:      toys/posix/id.c
	both modified:      toys/posix/ls.c

Change-Id: Ib36c5267ec054a5683ca37da2383d83b3cb1b5b4
Signed-off-by: Hyejin Kim <hyejin0906.kim@samsung.com>