fix(util/file_lock): disable file locks in emscripten
fix(util/file_lock): disable file locks in emscripten

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