travis: Uncomment the distdir check
travis: Uncomment the distdir check

It should work after distcheck problem is resolved.

OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community,OpenNetworking/gcoin-community