recovery: start watchdogd when in recovery

Start watchdogd from init.recovery.manta.rc to prevent rebooting 30
seconds after boot.

Bug: 6953625
Change-Id: I495e67f6e47e3805cb21707cbd35e5eabe17eb57
diff --git a/init.recovery.manta.rc b/init.recovery.manta.rc
new file mode 100644
index 0000000..78cc71b
--- /dev/null
+++ b/init.recovery.manta.rc
@@ -0,0 +1,6 @@
+on init
+    start watchdogd
+
+# Set watchdog timer to 30 seconds and pet it every 10 seconds to get a 20 second margin
+service watchdogd /sbin/watchdogd 10 20
+    class core