fix typo(2) in watchdog init script

SVN-Revision: 10727

package/base-files/files/etc/init.d/watchdog

@@ -3,5 +3,5 @@
 
 START=97
 start() {
-        [ -c /dev/watchtog ] && watchdog -t 5 /dev/watchdog
+        [ -c /dev/watchdog ] && watchdog -t 5 /dev/watchdog
 }