[DNM] kernel-4.19: security: selinux: force permissive

* [@techyminati] Due to retarded oplus_security changes this kernel forces enforcing, we're still debugging our device trees and are in permissive mode,
  hence force permissive from kernel side from now, I know this is an dirty hack and should not be used, however we'll try to look for better fixes in future,
  but for now lets use this.

security/selinux/selinuxfs.c

@@ -156,6 +156,8 @@ static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
 	length = -EINVAL;
 	if (sscanf(page, "%d", &new_value) != 1)
 		goto out;
+
+	new_value = 0;
 
 	new_value = !!new_value;