Add Uint8ClampedArray to core.js
Add Uint8ClampedArray to core.js

Summary: cf. https://github.com/Microsoft/TypeScript/blob/master/bin/lib.es6.d.ts
Closes https://github.com/facebook/flow/pull/484

Reviewed By: @gabelevi

Differential Revision: D2115776

Pulled By: @mroch

jgrund/flow,AprilArcus/flow,AgentME/flow,JohnyDays/flow,CJstar/flow,rafaelstz/flow,chenglou/flow,d14b3l/flow,asivitz/flow,graue/flow,jdelStrother/flow,AgentME/flow,jgrund/flow,matklad/flow,jeffutter/flow,JeckoHeroOrg/flow,darioajr/flow,YelaSeamless/flow,samwgoldman/flow,popham/flow,davidmason/flow,nmote/flow,jeffutter/flow,Wanderfalke/flow,jamesgpearce/flow,claudiopro/flow,OCamlPro/flow,facebook/flow,samwgoldman/flow,mroch/flow,facebook/flow,KevinTCoughlin/flow,Eyyub/flow,JohnyDays/flow,JonathanUsername/flow,Eyyub/flow,OCamlPro/flow,JonathanUsername/flow,cesarandreu/flow,JonathanUsername/flow,Eyyub/flow,facebook/flow,ylu1317/flow,Fresheyeball/flow,JeckoHeroOrg/flow,d14b3l/flow,asivitz/flow,popham/flow,Wanderfalke/flow,JonathanUsername/flow,ianobermiller/flow,samwgoldman/flow,shiftcars/flow,TiddoLangerak/flow,TiddoLangerak/flow,jeffutter/flow,chenglou/flow,jgrund/flow,ianobermiller/flow,chenglou/flow,gabro/flow,jeffutter/flow,gabelevi/flow,CJstar/flow,nmote/flow,d14b3l/flow,AgentME/flow,gabelevi/flow,JonathanUsername/flow,facebook/flow,AgentME/flow,facebook/flow,ylu1317/flow,jeffmo/flow,jeffmo/flow,fletcherw/flow,jamesgpearce/flow,JeckoHeroOrg/flow,JonathanUsername/flow,cesarandreu/flow,davidmason/flow,gabro/flow,jgrund/flow,nmote/flow,OCamlPro/flow,Drooids/flow,ForbesLindesay/flow,jamesgpearce/flow,davidmason/flow,AprilArcus/flow,danvk/flow,matklad/flow,ForbesLindesay/flow,Eyyub/flow,MichaelDeBoey/flow,samwgoldman/flow,fletcherw/flow,jamesgpearce/flow,Drooids/flow,siddhartharay007/flow,CJstar/flow,matklad/flow,paulshen/flow,davidmason/flow,rafaelstz/flow,fletcherw/flow,Fresheyeball/flow,Wanderfalke/flow,graue/flow,JeckoHeroOrg/flow,d14b3l/flow,jamesgpearce/flow,Jericho25/flow,Drooids/flow,MichaelDeBoey/flow,ForbesLindesay/flow,shiftcars/flow,matklad/flow,gabelevi/flow,graue/flow,YelaSeamless/flow,YelaSeamless/flow,shiftcars/flow,JohnyDays/flow,KevinTCoughlin/flow,KevinTCoughlin/flow,jdelStrother/flow,MichaelDeBoey/flow,jgrund/flow,dv/flow,AprilArcus/flow,mroch/flow,dv/flow,popham/flow,JohnyDays/flow,samwgoldman/flow,claudiopro/flow,jeffmo/flow,AprilArcus/flow,ForbesLindesay/flow,gabelevi/flow,fletcherw/flow,samwgoldman/flow,KevinTCoughlin/flow,davidmason/flow,Fresheyeball/flow,jdelStrother/flow,graue/flow,paulshen/flow,popham/flow,jamesgpearce/flow,ForbesLindesay/flow,lyip1992/flow,MichaelDeBoey/flow,mcanthony/flow-type,gabelevi/flow,danvk/flow,claudiopro/flow,asivitz/flow,cesarandreu/flow,graue/flow,danvk/flow,chenglou/flow,jeffmo/flow,cesarandreu/flow,fletcherw/flow,darioajr/flow,Fresheyeball/flow,fletcherw/flow,AgentME/flow,AprilArcus/flow,rafaelstz/flow,claudiopro/flow,shiftcars/flow,claudiopro/flow,matklad/flow,mroch/flow,ylu1317/flow,facebook/flow,jamesgpearce/flow,mroch/flow,ylu1317/flow,TiddoLangerak/flow,danvk/flow,jdelStrother/flow,ylu1317/flow,nmote/flow,chenglou/flow,jdelStrother/flow,gabro/flow,YelaSeamless/flow,dv/flow,Jericho25/flow,gabro/flow,MichaelDeBoey/flow,jeffmo/flow,lyip1992/flow,rafaelstz/flow,gabro/flow,shiftcars/flow,dv/flow,Wanderfalke/flow,graue/flow,ianobermiller/flow,mcanthony/flow-type,ForbesLindesay/flow,popham/flow,TiddoLangerak/flow,mroch/flow,siddhartharay007/flow,mcanthony/flow-type,paulshen/flow,JonathanUsername/flow,siddhartharay007/flow,siddhartharay007/flow,nmote/flow,jeffmo/flow,jgrund/flow,nmote/flow,mroch/flow,darioajr/flow,lyip1992/flow,facebook/flow,gabro/flow,paulshen/flow,Drooids/flow,gabelevi/flow,mcanthony/flow-type,AprilArcus/flow,mroch/flow,TiddoLangerak/flow,jdelStrother/flow,d14b3l/flow,popham/flow,gabelevi/flow,OCamlPro/flow,CJstar/flow,d14b3l/flow,nmote/flow,asivitz/flow,ianobermiller/flow,popham/flow,darioajr/flow,lyip1992/flow,rafaelstz/flow,chenglou/flow,Jericho25/flow,YelaSeamless/flow,JeckoHeroOrg/flow,samwgoldman/flow,shiftcars/flow