[PR] Work around error with Result when compiling JS build
[PR] Work around error with Result when compiling JS build

Summary:
`hack/third-party/core/result.ml` and the opam `result` module, which is a dependency of `lwt` and `base64`, which are dependencies of `js_of_ocaml`, both provide `result.cma`, leading to a Warning 31 about two modules with the same name. Warning 31 is an error in ocaml-4.03. Since this was a problem in 4.02 and things were ok, we'll just suppress the error until we can find a real solution.
Closes https://github.com/facebook/flow/pull/3444

Differential Revision: D4642365

Pulled By: mroch

fbshipit-source-id: 050b6b32c09d727db9ddfefb4d217bd096220f39

jamesgpearce/flow,gabro/flow,gabro/flow,AgentME/flow,gabelevi/flow,nmote/flow,ylu1317/flow,facebook/flow,AgentME/flow,fletcherw/flow,samwgoldman/flow,JonathanUsername/flow,JonathanUsername/flow,claudiopro/flow,MichaelDeBoey/flow,TiddoLangerak/flow,jamesgpearce/flow,gabelevi/flow,MichaelDeBoey/flow,TiddoLangerak/flow,nmote/flow,AgentME/flow,JonathanUsername/flow,mroch/flow,gabelevi/flow,fletcherw/flow,facebook/flow,jamesgpearce/flow,samwgoldman/flow,nmote/flow,TiddoLangerak/flow,facebook/flow,popham/flow,gabro/flow,popham/flow,gabelevi/flow,fletcherw/flow,gabelevi/flow,jamesgpearce/flow,gabro/flow,nmote/flow,jamesgpearce/flow,mroch/flow,TiddoLangerak/flow,samwgoldman/flow,nmote/flow,claudiopro/flow,mroch/flow,samwgoldman/flow,gabelevi/flow,AgentME/flow,claudiopro/flow,ylu1317/flow,popham/flow,jamesgpearce/flow,popham/flow,nmote/flow,ylu1317/flow,facebook/flow,MichaelDeBoey/flow,JonathanUsername/flow,samwgoldman/flow,ylu1317/flow,mroch/flow,MichaelDeBoey/flow,popham/flow,AgentME/flow,popham/flow,mroch/flow,claudiopro/flow,gabelevi/flow,JonathanUsername/flow,mroch/flow,mroch/flow,gabro/flow,JonathanUsername/flow,claudiopro/flow,TiddoLangerak/flow,MichaelDeBoey/flow,facebook/flow,fletcherw/flow,samwgoldman/flow,samwgoldman/flow,ylu1317/flow,facebook/flow,fletcherw/flow,jamesgpearce/flow,nmote/flow,popham/flow,gabro/flow,facebook/flow,JonathanUsername/flow,fletcherw/flow