Make version check not choke in community build.
Make version check not choke in community build.

In the context of the community build, the Scala version number
looks like 2.11.8-dbuildx182a60d41e15abdaee734163058b46bf8c5b22e5,
so we have to be careful when taking it apart.

andreaTP/scala-js,andreaTP/scala-js,spaced/scala-js,sjrd/scala-js,xuwei-k/scala-js,spaced/scala-js,gzm0/scala-js,xuwei-k/scala-js,sjrd/scala-js,ummels/scala-js,lrytz/scala-js,spaced/scala-js,ummels/scala-js,nicolasstucki/scala-js,andreaTP/scala-js,jasonchaffee/scala-js,gzm0/scala-js,lrytz/scala-js,scala-js/scala-js,scala-js/scala-js,mdedetrich/scala-js,ummels/scala-js,SebsLittleHelpers/scala-js,jasonchaffee/scala-js,mdedetrich/scala-js,japgolly/scala-js,xuwei-k/scala-js,SebsLittleHelpers/scala-js,mdedetrich/scala-js,japgolly/scala-js,jasonchaffee/scala-js,nicolasstucki/scala-js,sjrd/scala-js,scala-js/scala-js,japgolly/scala-js