Clean up umount targets (tiann/KernelSU#2386)

-move /system_ext after /product (ksu_handle_setuid)

-https://github.com/tiann/KernelSU

Author: aviraxp

kernel/core_hook.c

@@ -1298,14 +1298,13 @@ int ksu_handle_setuid(struct cred *new, const struct cred *old)
 	// filter the mountpoint whose target is `/data/adb`
 	try_umount("/odm", true, 0);
 	try_umount("/system", true, 0);
-	try_umount("/system_ext", true, 0);
 	try_umount("/vendor", true, 0);
 	try_umount("/product", true, 0);
+	try_umount("/system_ext", true, 0);
 	try_umount("/data/adb/modules", false, MNT_DETACH);
 
 	// try umount ksu temp path
 	try_umount("/debug_ramdisk", false, MNT_DETACH);
-	try_umount("/sbin", false, MNT_DETACH);
 
 	// try umount hosts file
 	try_umount("/system/etc/hosts", false, MNT_DETACH);