fusion: fix arg format on FileExistsInGuest & DirectoryExistsInGuest
fusion: fix arg format on FileExistsInGuest & DirectoryExistsInGuest

Signed-off-by: Koichi Shiraishi <2e5bdfebde234ed3509bcfc18121c70b6631e207@gmail.com>

go-vm/vmware,go-vm/vmware