libkbfs: Handle ignored errors in folder_branch_ops.go
libkbfs: Handle ignored errors in folder_branch_ops.go

keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/kbfs,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client