Fix Hash.prototype.update definition
Fix Hash.prototype.update definition

Summary:
https://github.com/nodejs/node/blob/master/lib/crypto.js#L71
Closes https://github.com/facebook/flow/pull/1316

Reviewed By: gabelevi

Differential Revision: D2877274

Pulled By: samwgoldman

fb-gh-sync-id: 82cd965598de444c14229c0d2652bfd4dca91a43

TiddoLangerak/flow,AprilArcus/flow,JonathanUsername/flow,d14b3l/flow,AprilArcus/flow,ylu1317/flow,jgrund/flow,ForbesLindesay/flow,nmote/flow,popham/flow,gabro/flow,d14b3l/flow,jeffmo/flow,samwgoldman/flow,jamesgpearce/flow,jgrund/flow,samwgoldman/flow,ylu1317/flow,samwgoldman/flow,jgrund/flow,graue/flow,graue/flow,gabro/flow,facebook/flow,jdelStrother/flow,chenglou/flow,fletcherw/flow,shiftcars/flow,facebook/flow,facebook/flow,jgrund/flow,popham/flow,mroch/flow,ForbesLindesay/flow,gabro/flow,jeffmo/flow,d14b3l/flow,popham/flow,ForbesLindesay/flow,samwgoldman/flow,jdelStrother/flow,mroch/flow,ForbesLindesay/flow,fletcherw/flow,chenglou/flow,JonathanUsername/flow,jamesgpearce/flow,TiddoLangerak/flow,nmote/flow,samwgoldman/flow,nmote/flow,MichaelDeBoey/flow,gabro/flow,mroch/flow,MichaelDeBoey/flow,ylu1317/flow,jeffmo/flow,chenglou/flow,AprilArcus/flow,ForbesLindesay/flow,TiddoLangerak/flow,graue/flow,TiddoLangerak/flow,AgentME/flow,d14b3l/flow,jamesgpearce/flow,gabelevi/flow,mroch/flow,cesarandreu/flow,gabelevi/flow,popham/flow,jamesgpearce/flow,jeffmo/flow,facebook/flow,shiftcars/flow,fletcherw/flow,JonathanUsername/flow,MichaelDeBoey/flow,popham/flow,claudiopro/flow,JonathanUsername/flow,JonathanUsername/flow,graue/flow,TiddoLangerak/flow,graue/flow,shiftcars/flow,AgentME/flow,cesarandreu/flow,shiftcars/flow,nmote/flow,samwgoldman/flow,chenglou/flow,popham/flow,JonathanUsername/flow,d14b3l/flow,gabelevi/flow,popham/flow,JonathanUsername/flow,shiftcars/flow,samwgoldman/flow,gabelevi/flow,AprilArcus/flow,facebook/flow,cesarandreu/flow,AgentME/flow,chenglou/flow,gabelevi/flow,claudiopro/flow,mroch/flow,gabro/flow,gabro/flow,jeffmo/flow,gabelevi/flow,AprilArcus/flow,ylu1317/flow,fletcherw/flow,nmote/flow,fletcherw/flow,AgentME/flow,AgentME/flow,nmote/flow,claudiopro/flow,jdelStrother/flow,gabelevi/flow,jdelStrother/flow,jamesgpearce/flow,jeffmo/flow,jgrund/flow,graue/flow,chenglou/flow,jdelStrother/flow,MichaelDeBoey/flow,mroch/flow,jamesgpearce/flow,nmote/flow,cesarandreu/flow,mroch/flow,facebook/flow,jgrund/flow,d14b3l/flow,jamesgpearce/flow,shiftcars/flow,facebook/flow,AprilArcus/flow,ylu1317/flow,claudiopro/flow,fletcherw/flow,MichaelDeBoey/flow,ForbesLindesay/flow,claudiopro/flow,jdelStrother/flow