util-linux: add runuser PAM config files to fix runuser error

The runuser command fails with below error message, add proper PAM
config files to fix the problem. The config files are borrowed from
CentOS 7.0 release.

runuser: Failure setting user credentials

(From OE-Core rev: a6616f1a7b8e30428e61b6437f2f48379efc101d)

Signed-off-by: Shan Hai <shan.hai@windriver.com>
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/util-linux/util-linux.inc

@@ -163,6 +163,12 @@ do_install () {
 	echo 'MOUNTALL="-t nonfs,nosmbfs,noncpfs"' > ${D}${sysconfdir}/default/mountall
 
 	rm -f ${D}${bindir}/chkdupexe
+
+	if [ "${@bb.utils.contains('DISTRO_FEATURES', 'pam', 'pam', '', d)}" = "pam" ]; then
+		install -d ${D}${sysconfdir}/pam.d
+		install -m 0644 ${WORKDIR}/runuser.pamd ${D}${sysconfdir}/pam.d/runuser
+		install -m 0644 ${WORKDIR}/runuser-l.pamd ${D}${sysconfdir}/pam.d/runuser-l
+	fi
 }
 
 # reset and nologin causes a conflict with ncurses-native and shadow-native

meta/recipes-core/util-linux/util-linux/runuser-l.pamd

@@ -0,0 +1,3 @@
+auth	include		runuser
+session	optional	pam_keyinit.so force revoke
+session include		runuser

meta/recipes-core/util-linux/util-linux/runuser.pamd

@@ -0,0 +1,4 @@
+auth	sufficient	pam_rootok.so
+session	optional	pam_keyinit.so revoke
+session	required	pam_limits.so
+session	required	pam_unix.so

meta/recipes-core/util-linux/util-linux_2.26.2.bb

@@ -13,6 +13,8 @@ SRC_URI += "file://util-linux-ng-replace-siginterrupt.patch \
             file://uclibc-__progname-conflict.patch \
             file://configure-sbindir.patch \
             file://fix-parallel-build.patch \
+            file://runuser.pamd \
+            file://runuser-l.pamd \
             ${OLDHOST} \
 "
 SRC_URI[md5sum] = "9bdf368c395f1b70325d0eb22c7f48fb"