add all Makefile targets to gitignore
add all Makefile targets to gitignore

ferranti/watchdog,MjAbuz/watchdog,ferranti/watchdog,aaronsw/watchdog,MjAbuz/watchdog,aaronsw/watchdog,aaronsw/watchdog,MjAbuz/watchdog,ferranti/watchdog,ferranti/watchdog,MjAbuz/watchdog