ldap: Pull nss-pam-ldapd into the openbmc image

Bringing the LDAP authentication module support in openbmc stack
requires to pull the nss-pam-ldapd which allows the LDAP
server to provide the user, passwd, group info that we normally get
from the /etc flat files.

nss-pam-ldapd provides libnss-ldap and pam_ldap module which
delegate the work to the nslcd(daemon) that queries the LDAP server.
pam_ldap uses the openldap client API to interact with the LDAP server.

nss-pam-ldapd files are pulled from
http://git.yoctoproject.org/cgit/cgit.cgi/meta-cloud-services/
tree/recipes-support/nss-pam-ldapd

meta-cloud-services sha: 38cc19fb3a813673051de314aafabda0545d8466

Tested: Adding the "ldap" distro feature brings the nss-pam-ldapd
and its dependencies into the image and removing the "ldap" from the
distro feature doesn't bring the nss-pam-ldapd and its dependencies.

(From meta-phosphor rev: 4835bb3901a4bff777a97d4f363e3a731b87f21c)

Change-Id: Ifa5da20e7ac47b0c9d9af305ae621252e6d765f3
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-support/nss-pam-ldapd/files/nslcd.service b/meta-phosphor/recipes-support/nss-pam-ldapd/files/nslcd.service
new file mode 100644
index 0000000..bc67242
--- /dev/null
+++ b/meta-phosphor/recipes-support/nss-pam-ldapd/files/nslcd.service
@@ -0,0 +1,10 @@
+[Unit]
+Description=LDAP daemon
+After=syslog.target network.target
+
+[Service]
+Type=forking
+ExecStart=/usr/sbin/nslcd
+
+[Install]
+WantedBy=multi-user.target