When adding a trigger, bump the tick count
When adding a trigger, bump the tick count

In the case where you add a trigger but don't change any files,
we were quietly sitting on the total list of files until the next
observed file change.

This makes trigger work a little more like subscribe (which sends you
your initial results when you subscribe), and makes it easier when
you're setting up triggers: you won't need to register the trigger and
then run the build command anyway.

Also: our docs say that it works like this, but it hasn't for a while.

supriyantomaftuh/watchman,yangeagle/watchman,facebook/watchman,windofthesky/watchman,kevinsawicki/watchman,alanwill/watchman,twitter/watchman,bhamiltoncx/watchman,kwlzn/watchman,kwlzn/watchman,bitemyapp/watchman,yonglehou/watchman,yun63/watchman,amasad/watchman,michalliu/watchman,windofthesky/watchman,montogeek/watchman,dcolascione/laptop-watchman,phmx/watchman,Jonekee/watchman,kevinsawicki/watchman,facebook/watchman,sdgdsffdsfff/watchman,facebook/watchman,michalliu/watchman,nodakai/watchman,supriyantomaftuh/watchman,twitter/watchman,besarthoxhaj/watchman,yangeagle/watchman,Jonekee/watchman,exponentjs/watchman,nodakai/watchman,twitter/watchman,dhruvsinghal/watchman,twitter/watchman,besarthoxhaj/watchman,nodakai/watchman,yun63/watchman,kwlzn/watchman,twitter/watchman,yangeagle/watchman,hanhailong/watchman,amasad/watchman,hanhailong/watchman,dhruvsinghal/watchman,dcolascione/laptop-watchman,yonglehou/watchman,sdgdsffdsfff/watchman,masoncloud/watchman,dhruvsinghal/watchman,montogeek/watchman,yangeagle/watchman,webmasteraxe/watchman,Jonekee/watchman,amasad/watchman,alanwill/watchman,nodakai/watchman,dcolascione/laptop-watchman,yonglehou/watchman,masoncloud/watchman,exponentjs/watchman,masoncloud/watchman,bhamiltoncx/watchman,yangeagle/watchman,wez/watchman,montogeek/watchman,kevinsawicki/watchman,dhruvsinghal/watchman,amasad/watchman,bitemyapp/watchman,yun63/watchman,sdgdsffdsfff/watchman,facebook/watchman,yonglehou/watchman,windofthesky/watchman,wez/watchman,Jonekee/watchman,kevinsawicki/watchman,kwlzn/watchman,nodakai/watchman,yonglehou/watchman,hanhailong/watchman,supriyantomaftuh/watchman,exponentjs/watchman,hanhailong/watchman,bhamiltoncx/watchman,Ziriax/watchman,masoncloud/watchman,alanwill/watchman,dcolascione/laptop-watchman,wez/watchman,webmasteraxe/watchman,dcolascione/laptop-watchman,webmasteraxe/watchman,supriyantomaftuh/watchman,montogeek/watchman,michalliu/watchman,Ziriax/watchman,yun63/watchman,yun63/watchman,dhruvsinghal/watchman,bhamiltoncx/watchman,exponentjs/watchman,supriyantomaftuh/watchman,dcolascione/laptop-watchman,michalliu/watchman,exponentjs/watchman,hanhailong/watchman,nodakai/watchman,supriyantomaftuh/watchman,michalliu/watchman,besarthoxhaj/watchman,webmasteraxe/watchman,besarthoxhaj/watchman,alanwill/watchman,phmx/watchman,montogeek/watchman,webmasteraxe/watchman,yun63/watchman,yangeagle/watchman,sdgdsffdsfff/watchman,alanwill/watchman,michalliu/watchman,bitemyapp/watchman,bitemyapp/watchman,sdgdsffdsfff/watchman,yangeagle/watchman,masoncloud/watchman,webmasteraxe/watchman,Ziriax/watchman,windofthesky/watchman,amasad/watchman,alanwill/watchman,twitter/watchman,Ziriax/watchman,bitemyapp/watchman,wez/watchman,yonglehou/watchman,sdgdsffdsfff/watchman,facebook/watchman,Jonekee/watchman,yonglehou/watchman,wez/watchman,kevinsawicki/watchman,amasad/watchman,Ziriax/watchman,phmx/watchman,windofthesky/watchman,wez/watchman,wez/watchman,facebook/watchman,dhruvsinghal/watchman,dhruvsinghal/watchman,kwlzn/watchman,amasad/watchman,webmasteraxe/watchman,masoncloud/watchman,besarthoxhaj/watchman,nodakai/watchman,Jonekee/watchman,nodakai/watchman,facebook/watchman,michalliu/watchman,phmx/watchman,Jonekee/watchman,besarthoxhaj/watchman,phmx/watchman,masoncloud/watchman,windofthesky/watchman,sdgdsffdsfff/watchman,Ziriax/watchman,michalliu/watchman,besarthoxhaj/watchman,montogeek/watchman,hanhailong/watchman,dhruvsinghal/watchman,besarthoxhaj/watchman,bitemyapp/watchman,bitemyapp/watchman,sdgdsffdsfff/watchman,bhamiltoncx/watchman,dcolascione/laptop-watchman,hanhailong/watchman,facebook/watchman,dcolascione/laptop-watchman,exponentjs/watchman,kevinsawicki/watchman,wez/watchman,kevinsawicki/watchman,supriyantomaftuh/watchman,wez/watchman,facebook/watchman,yun63/watchman,bitemyapp/watchman,montogeek/watchman,hanhailong/watchman,Jonekee/watchman,bhamiltoncx/watchman,yun63/watchman,twitter/watchman,phmx/watchman,webmasteraxe/watchman,masoncloud/watchman,kwlzn/watchman,windofthesky/watchman,nodakai/watchman,supriyantomaftuh/watchman,twitter/watchman,kwlzn/watchman,yonglehou/watchman,montogeek/watchman,amasad/watchman