omni: sepolicy: fixup extended fs rules

for ntfs and exfat

Change-Id: I5d22e83958a3a731799b7fe6c7f0c119128ddc0b
diff --git a/sepolicy/vold.te b/sepolicy/vold.te
index a72bcdf..9d05d8b 100644
--- a/sepolicy/vold.te
+++ b/sepolicy/vold.te
@@ -21,3 +21,5 @@
 allow vold fuse_device:dir getattr;
 allow vold fuse_device:filesystem unmount;
 
+allow vold fsck_exec:lnk_file { read };
+