[PR] Build libflowparser in travis
[PR] Build libflowparser in travis

Summary: Closes https://github.com/facebook/flow/pull/5618

Differential Revision: D6668679

Pulled By: mroch

fbshipit-source-id: 9449b070c1f66706e6d6ac5a76b1f88be6e44012

AgentME/flow,gabelevi/flow,nmote/flow,mroch/flow,popham/flow,facebook/flow,facebook/flow,gabelevi/flow,samwgoldman/flow,mroch/flow,nmote/flow,nmote/flow,jamesgpearce/flow,AgentME/flow,mroch/flow,jamesgpearce/flow,samwgoldman/flow,JonathanUsername/flow,nmote/flow,samwgoldman/flow,AgentME/flow,jamesgpearce/flow,samwgoldman/flow,claudiopro/flow,popham/flow,mroch/flow,popham/flow,JonathanUsername/flow,gabelevi/flow,mroch/flow,nmote/flow,jamesgpearce/flow,facebook/flow,samwgoldman/flow,claudiopro/flow,popham/flow,facebook/flow,mroch/flow,claudiopro/flow,claudiopro/flow,gabelevi/flow,gabelevi/flow,claudiopro/flow,nmote/flow,JonathanUsername/flow,popham/flow,popham/flow,jamesgpearce/flow,facebook/flow,facebook/flow,gabelevi/flow,AgentME/flow,JonathanUsername/flow,jamesgpearce/flow,AgentME/flow,nmote/flow,jamesgpearce/flow,facebook/flow,JonathanUsername/flow,samwgoldman/flow,gabelevi/flow,JonathanUsername/flow,samwgoldman/flow,JonathanUsername/flow,mroch/flow,popham/flow