[hack] Don't report broken pipes in server connect code
[hack] Don't report broken pipes in server connect code

Summary: This just means that the `hh_client` on the other end of the
pipe went away before we finished.

Reviewed By: @int3

Differential Revision: D2271043

JohnyDays/flow,OCamlPro/flow,KevinTCoughlin/flow,popham/flow,darioajr/flow,darioajr/flow,ForbesLindesay/flow,gabelevi/flow,JonathanUsername/flow,rafaelstz/flow,danvk/flow,cesarandreu/flow,popham/flow,samwgoldman/flow,mroch/flow,jdelStrother/flow,gabro/flow,KevinTCoughlin/flow,Wanderfalke/flow,ylu1317/flow,cesarandreu/flow,d14b3l/flow,MichaelDeBoey/flow,samwgoldman/flow,AprilArcus/flow,danvk/flow,JonathanUsername/flow,asivitz/flow,d14b3l/flow,jamesgpearce/flow,d14b3l/flow,mroch/flow,AgentME/flow,matklad/flow,nmote/flow,gabelevi/flow,CJstar/flow,facebook/flow,TiddoLangerak/flow,chenglou/flow,jeffmo/flow,jeffutter/flow,jgrund/flow,facebook/flow,CJstar/flow,jdelStrother/flow,mroch/flow,d14b3l/flow,gabelevi/flow,mroch/flow,AgentME/flow,ianobermiller/flow,JonathanUsername/flow,cesarandreu/flow,OCamlPro/flow,ForbesLindesay/flow,matklad/flow,jeffutter/flow,paulshen/flow,danvk/flow,lyip1992/flow,darioajr/flow,cesarandreu/flow,shiftcars/flow,facebook/flow,JeckoHeroOrg/flow,ylu1317/flow,siddhartharay007/flow,gabelevi/flow,ylu1317/flow,ForbesLindesay/flow,nmote/flow,popham/flow,AprilArcus/flow,facebook/flow,matklad/flow,JonathanUsername/flow,darioajr/flow,jdelStrother/flow,graue/flow,claudiopro/flow,Fresheyeball/flow,claudiopro/flow,Wanderfalke/flow,Wanderfalke/flow,gabro/flow,paulshen/flow,ForbesLindesay/flow,Eyyub/flow,nmote/flow,Drooids/flow,graue/flow,Eyyub/flow,matklad/flow,Eyyub/flow,MichaelDeBoey/flow,AprilArcus/flow,AgentME/flow,AprilArcus/flow,KevinTCoughlin/flow,JohnyDays/flow,ylu1317/flow,jgrund/flow,dv/flow,Drooids/flow,JeckoHeroOrg/flow,jeffmo/flow,mcanthony/flow-type,fletcherw/flow,TiddoLangerak/flow,fletcherw/flow,nmote/flow,gabelevi/flow,OCamlPro/flow,rafaelstz/flow,chenglou/flow,nmote/flow,popham/flow,jamesgpearce/flow,dv/flow,graue/flow,nmote/flow,shiftcars/flow,asivitz/flow,chenglou/flow,JonathanUsername/flow,siddhartharay007/flow,MichaelDeBoey/flow,AprilArcus/flow,popham/flow,fletcherw/flow,samwgoldman/flow,chenglou/flow,JeckoHeroOrg/flow,mcanthony/flow-type,TiddoLangerak/flow,samwgoldman/flow,mroch/flow,matklad/flow,popham/flow,AgentME/flow,Eyyub/flow,shiftcars/flow,Wanderfalke/flow,CJstar/flow,jgrund/flow,gabelevi/flow,jeffmo/flow,siddhartharay007/flow,AgentME/flow,rafaelstz/flow,jdelStrother/flow,lyip1992/flow,jeffmo/flow,gabro/flow,gabro/flow,MichaelDeBoey/flow,d14b3l/flow,jgrund/flow,facebook/flow,graue/flow,JeckoHeroOrg/flow,ianobermiller/flow,chenglou/flow,samwgoldman/flow,rafaelstz/flow,gabelevi/flow,paulshen/flow,siddhartharay007/flow,chenglou/flow,OCamlPro/flow,lyip1992/flow,jamesgpearce/flow,fletcherw/flow,KevinTCoughlin/flow,lyip1992/flow,jamesgpearce/flow,ForbesLindesay/flow,claudiopro/flow,fletcherw/flow,dv/flow,graue/flow,jgrund/flow,Fresheyeball/flow,CJstar/flow,claudiopro/flow,rafaelstz/flow,paulshen/flow,popham/flow,shiftcars/flow,JeckoHeroOrg/flow,facebook/flow,ylu1317/flow,JohnyDays/flow,JonathanUsername/flow,Fresheyeball/flow,graue/flow,jamesgpearce/flow,jamesgpearce/flow,dv/flow,claudiopro/flow,facebook/flow,JonathanUsername/flow,mroch/flow,asivitz/flow,ianobermiller/flow,jgrund/flow,MichaelDeBoey/flow,jeffutter/flow,mroch/flow,jamesgpearce/flow,jdelStrother/flow,samwgoldman/flow,ianobermiller/flow,mcanthony/flow-type,mcanthony/flow-type,gabro/flow,asivitz/flow,ForbesLindesay/flow,AprilArcus/flow,nmote/flow,TiddoLangerak/flow,TiddoLangerak/flow,fletcherw/flow,danvk/flow,shiftcars/flow,JohnyDays/flow,samwgoldman/flow,jdelStrother/flow,Drooids/flow,jeffmo/flow,jeffutter/flow,gabro/flow,jeffmo/flow,Drooids/flow,d14b3l/flow,Fresheyeball/flow,shiftcars/flow