tools: NFD startup script

`nfd-start` starts NFD and RIB daemon.
`nfd-stop` stops NFD and RIB daemon.
They are intended for source installation only.
Binary packages should prefer to use system service mechanism if available.

refs #1488

Change-Id: I09f2168619a47fdc0faa78079b7994f30f41ff75
diff --git a/tools/nfd-stop.sh b/tools/nfd-stop.sh
new file mode 100755
index 0000000..c0b46bd
--- /dev/null
+++ b/tools/nfd-stop.sh
@@ -0,0 +1,4 @@
+#!@BASH@
+
+sudo killall nrd
+sudo killall nfd