watchdog: Rewrite using sdbusplus

Change-Id: I730317954819859d23fdaca7336f19f5c5b0c107
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/Makefile.am b/Makefile.am
index d519ba7..2828e6f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,6 +60,7 @@
 	net.cpp \
 	app/channel.cpp \
 	app/watchdog.cpp \
+	app/watchdog_service.cpp \
 	apphandler.cpp \
 	sensorhandler.cpp \
 	storagehandler.cpp \