shadow-native: use 'users' group by default

The rootfs has 'users' group at number 100 and without this fix it
would assign to a non-existent group and if a group with gid as 1000
is created later it would own all files for users created.

(From OE-Core rev: 42e9f988bc691ca763d5eda3537d6281b7902794)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

Reworked commit to fix merge conflicts with denzil branch.

Signed-off-by: Scott Garman <scott.a.garman@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/shadow/shadow-native_4.1.4.3.bb

@@ -7,7 +7,7 @@ LICENSE = "BSD | Artistic-1.0"
 LIC_FILES_CHKSUM = "file://COPYING;md5=08c553a87d4e51bbed50b20e0adcaede \
                     file://src/passwd.c;firstline=8;endline=30;md5=2899a045e90511d0e043b85a7db7e2fe"
 
-PR = "r4"
+PR = "r5"
 
 SRC_URI = "http://pkg-shadow.alioth.debian.org/releases/${BPN}-${PV}.tar.bz2 \
            file://shadow.automake-1.11.patch \
@@ -44,6 +44,9 @@ do_install_append() {
 	sed -i 's:/bin/bash:/bin/sh:g' ${D}${sysconfdir}/default/useradd
 	sed -i '/^CREATE_MAIL_SPOOL/ s:^:#:' ${D}${sysconfdir}/default/useradd
 
+	# Use users group by default
+	sed -i 's,^GROUP=1000,GROUP=100,g' ${D}${sysconfdir}/default/useradd
+
 	install -d ${D}${sbindir} ${D}${base_sbindir} ${D}${base_bindir} 
 	for i in passwd chfn newgrp chsh ; do
 		mv ${D}${bindir}/$i ${D}${bindir}/$i.${PN}