Fix build on DragonFlyBSD

License: MIT
Signed-off-by: Pierre-Alain TORET <pierre-alain.toret@protonmail.com>

core/commands/mount_nofuse.go

-// +build linux darwin freebsd netbsd openbsd
+// +build linux darwin freebsd netbsd openbsd dragonfly
 // +build nofuse
 
 package commands

fuse/node/mount_nofuse.go

-// +build linux darwin freebsd netbsd openbsd
+// +build linux darwin freebsd netbsd openbsd dragonfly
 // +build nofuse
 
 package node