mount/cmount: factor duplicated code into mountlib

cmd/mountlib/mount_non_unix.go

@@ -0,0 +1,11 @@
+// +build !linux,!darwin,!freebsd
+
+package mountlib
+
+import (
+	"github.com/spf13/pflag"
+)
+
+// add any extra platform specific flags
+func platformFlags(flags *pflag.FlagSet) {
+}