init: allow LOOP_GET_STATUS ioctl on loop device

This is needed here:
https://android.googlesource.com/platform/system/core/+/refs/heads/master/init/builtins.cpp#494

Bug: 170934466
Test: TH
Change-Id: I8e6d06cae42d68182e9cca29723f0b16ff413b7c
diff --git a/public/init.te b/public/init.te
index f84bacb..805d9c2 100644
--- a/public/init.te
+++ b/public/init.te
@@ -412,6 +412,7 @@
   LOOP_CTL_GET_FREE
   LOOP_SET_BLOCK_SIZE
   LOOP_SET_DIRECT_IO
+  LOOP_GET_STATUS
 };
 
 # Allow init to write to vibrator/trigger