meta-ibm: wspoon: network: add explicit install append

Add an explicit install_append for the network recipe so it'll install a
service that witherspoon requires.

Note: This change required due to a change in network_git.bb that
changed the systemd installation behavior.

(From meta-ibm rev: 8637f02c1caec99d09dc7d7f8051e64a68ca8a19)

Change-Id: Ic7c538d340e610cffc7f20f88cc492c2f550322c
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-witherspoon/recipes-phosphor/network/network_%.bbappend b/meta-ibm/meta-witherspoon/recipes-phosphor/network/network_%.bbappend
index 7e0dc2f..40a0567 100644
--- a/meta-ibm/meta-witherspoon/recipes-phosphor/network/network_%.bbappend
+++ b/meta-ibm/meta-witherspoon/recipes-phosphor/network/network_%.bbappend
@@ -1,2 +1,8 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+SRC_URI += "file://ncsi-netlink.service"
 SYSTEMD_SERVICE_${PN} += "ncsi-netlink.service"
+
+do_install_append() {
+    install -d ${D}${systemd_system_unitdir}
+    install -m 0644 ${WORKDIR}/ncsi-netlink.service ${D}${systemd_system_unitdir}
+}