chore(.travis.yml): use static build for binary distribution for Linux
chore(.travis.yml): use static build for binary distribution for Linux

johoelzl/lean,leanprover-community/lean,fgdorais/lean,fgdorais/lean,fgdorais/lean,leanprover/lean,fpvandoorn/lean,Kha/lean,johoelzl/lean,leanprover/lean,leodemoura/lean,dselsam/lean,dselsam/lean,johoelzl/lean,dselsam/lean,digama0/lean,avigad/lean,leodemoura/lean,fgdorais/lean,johoelzl/lean,avigad/lean,rlewis1988/lean,digama0/lean,rlewis1988/lean,leanprover/lean,dselsam/lean,johoelzl/lean,fpvandoorn/lean,leanprover-community/lean,leanprover/lean,fgdorais/lean,leanprover/lean,avigad/lean,rlewis1988/lean,leodemoura/lean,avigad/lean,leanprover-community/lean,avigad/lean,fpvandoorn/lean,Kha/lean,digama0/lean,fpvandoorn/lean,leanprover-community/lean,rlewis1988/lean,fgdorais/lean,leanprover-community/lean,fpvandoorn/lean,leodemoura/lean,Kha/lean,fpvandoorn/lean,rlewis1988/lean,avigad/lean,leodemoura/lean,leanprover/lean,rlewis1988/lean,digama0/lean,Kha/lean,dselsam/lean,Kha/lean,dselsam/lean,digama0/lean,Kha/lean,johoelzl/lean,digama0/lean,leodemoura/lean,leanprover-community/lean