aspeed-layer: jsnbd: Add script for USB mass storage device

This script is called by the nbd-proxy app to start/stop
the USB mass storage device.

(From meta-phosphor rev: c1b537d2366120c2460ed66c872b87ceab59b0d0)

Change-Id: I414c52cb4a262199dc8b373e016cf09dae211a8a
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/aspeed-layer/recipes-connectivity/jsnbd/jsnbd_git.bbappend b/meta-phosphor/aspeed-layer/recipes-connectivity/jsnbd/jsnbd_git.bbappend
new file mode 100644
index 0000000..3ccc087
--- /dev/null
+++ b/meta-phosphor/aspeed-layer/recipes-connectivity/jsnbd/jsnbd_git.bbappend
@@ -0,0 +1,9 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+
+FILES_${PN} += "${sysconfdir}/nbd-proxy/state"
+SRC_URI += "file://state_hook"
+
+do_install_append() {
+    install -d ${D}${sysconfdir}/nbd-proxy/
+    install -m 0755 ${WORKDIR}/state_hook ${D}${sysconfdir}/nbd-proxy/state
+}