Update .travis.yml notification setting for IRC
Update .travis.yml notification setting for IRC

Previously the travis-ci bot would post in IRC for every passing build. Let's change this to only post in IRC for a passing build if the build for previous commit failed.
facebook/flow,asivitz/flow,ForbesLindesay/flow,OCamlPro/flow,Fresheyeball/flow,chenglou/flow,danvk/flow,popham/flow,claudiopro/flow,fletcherw/flow,mroch/flow,fletcherw/flow,chenglou/flow,chenglou/flow,popham/flow,cesarandreu/flow,jdelStrother/flow,jamesgpearce/flow,shiftcars/flow,jgrund/flow,JonathanUsername/flow,fletcherw/flow,jeffutter/flow,facebook/flow,gabelevi/flow,MichaelDeBoey/flow,gabro/flow,gabelevi/flow,siddhartharay007/flow,JonathanUsername/flow,fletcherw/flow,Fresheyeball/flow,jeffutter/flow,ylu1317/flow,jeffmo/flow,popham/flow,jeffmo/flow,mcanthony/flow-type,mroch/flow,facebook/flow,JohnyDays/flow,gabelevi/flow,jamesgpearce/flow,cesarandreu/flow,paulshen/flow,gabelevi/flow,jamesgpearce/flow,samwgoldman/flow,nmote/flow,ForbesLindesay/flow,gabro/flow,asivitz/flow,KevinTCoughlin/flow,claudiopro/flow,samwgoldman/flow,AprilArcus/flow,mcanthony/flow-type,mcanthony/flow-type,TiddoLangerak/flow,mroch/flow,d14b3l/flow,fletcherw/flow,shiftcars/flow,popham/flow,AprilArcus/flow,nmote/flow,jeffmo/flow,KevinTCoughlin/flow,danvk/flow,JohnyDays/flow,jgrund/flow,siddhartharay007/flow,paulshen/flow,d14b3l/flow,nmote/flow,AprilArcus/flow,jdelStrother/flow,ylu1317/flow,asivitz/flow,jgrund/flow,Wanderfalke/flow,KevinTCoughlin/flow,jgrund/flow,samwgoldman/flow,shiftcars/flow,claudiopro/flow,gabro/flow,mroch/flow,gabro/flow,gabro/flow,MichaelDeBoey/flow,TiddoLangerak/flow,graue/flow,jdelStrother/flow,JohnyDays/flow,facebook/flow,claudiopro/flow,JonathanUsername/flow,gabelevi/flow,paulshen/flow,jeffutter/flow,claudiopro/flow,gabro/flow,paulshen/flow,ForbesLindesay/flow,ForbesLindesay/flow,d14b3l/flow,AprilArcus/flow,chenglou/flow,mroch/flow,samwgoldman/flow,chenglou/flow,AgentME/flow,jdelStrother/flow,mroch/flow,graue/flow,Fresheyeball/flow,gabelevi/flow,jamesgpearce/flow,ForbesLindesay/flow,danvk/flow,samwgoldman/flow,ylu1317/flow,darioajr/flow,chenglou/flow,KevinTCoughlin/flow,TiddoLangerak/flow,jamesgpearce/flow,Fresheyeball/flow,MichaelDeBoey/flow,JohnyDays/flow,samwgoldman/flow,facebook/flow,popham/flow,MichaelDeBoey/flow,mroch/flow,cesarandreu/flow,AgentME/flow,siddhartharay007/flow,JonathanUsername/flow,shiftcars/flow,d14b3l/flow,AprilArcus/flow,AgentME/flow,facebook/flow,OCamlPro/flow,gabelevi/flow,popham/flow,Eyyub/flow,AgentME/flow,d14b3l/flow,asivitz/flow,darioajr/flow,samwgoldman/flow,mcanthony/flow-type,shiftcars/flow,d14b3l/flow,cesarandreu/flow,Wanderfalke/flow,graue/flow,TiddoLangerak/flow,Eyyub/flow,jeffutter/flow,jeffmo/flow,TiddoLangerak/flow,ForbesLindesay/flow,Wanderfalke/flow,graue/flow,AprilArcus/flow,darioajr/flow,jeffmo/flow,popham/flow,facebook/flow,OCamlPro/flow,jgrund/flow,jdelStrother/flow,ylu1317/flow,JonathanUsername/flow,AgentME/flow,jeffmo/flow,OCamlPro/flow,Eyyub/flow,danvk/flow,siddhartharay007/flow,nmote/flow,Eyyub/flow,MichaelDeBoey/flow,darioajr/flow,jamesgpearce/flow,nmote/flow,jamesgpearce/flow,graue/flow,JonathanUsername/flow,JonathanUsername/flow,Wanderfalke/flow,jgrund/flow,shiftcars/flow,nmote/flow,ylu1317/flow,graue/flow,jdelStrother/flow,fletcherw/flow,nmote/flow