tests: stabilize `test-status-eacces.t` on Windows

As noted earlier, `chmod` doesn't complain in MSYS, but also doesn't alter the
file permissions such that they are unreadable.

I'm guessing the other lines of output in this area that are gated on `rhg` (or
not) will also need this, but I don't want to dig too deeply into something that
is apparently working well enough.

tests/test-status-eacces.t

@@ -1,45 +1,47
 #testcases dirstate-v1 dirstate-v2
 
 #if dirstate-v2
   $ cat >> $HGRCPATH << EOF
   > [format]
   > use-dirstate-v2=1
   > [storage]
   > dirstate-v2.slow-path=allow
   > EOF
 #endif
 
 
 The proliferation of status implementations can be confusing:
 - The pure python implementation:
 (no-rhg pure !)
 - The C implementation:
 (no-rhg no-rust no-pure !)
 - The two rust implementations:
 (rhg !)
 (no-rhg rust !)
 
   $ hg init repo1
   $ cd repo1
   $ mkdir d1
   $ touch d1/x
   $ hg commit -Am.
   adding d1/x
   $ touch d1/y
   $ chmod -r d1
   $ hg status
-  d1: $EACCES$
+  d1: $EACCES$ (unix-permissions !)
   ! d1/x (rhg !)
   ! d1/x (no-rhg rust !)
+  ? d1/y (no-unix-permissions !)
   $ hg status
-  d1: $EACCES$
+  d1: $EACCES$ (unix-permissions !)
   ! d1/x (rust !)
   ! d1/x (no-rust rhg !)
+  ? d1/y (no-unix-permissions !)
   $ chmod +r d1
   $ hg status
   ? d1/y
 
   $ touch d1/z
   $ hg status
   ? d1/y
   ? d1/z