[NaCl SDK] nacl_io: Fix html5fs stat on directories

[NaCl SDK] nacl_io: Fix html5fs stat on directories

This used to return RWX, but regressed as of
314a240ec3fd6a40f9e2e543fa692eb44d667ab2.

BUG=none
R=sbc@chromium.org
R=bradnelson@chromium.org

Committed: https://crrev.com/865a65ad84ac9a6b1a89aaf3bfb0fe77fc6be3d9
Cr-Commit-Position: refs/heads/master@{#295844}

[bradn, 2014-09-20 00:02:46]

bradnelson@google.com changed reviewers:
+ bradnelson@google.com

[bradn, 2014-09-20 00:02:47]

lgtm

[Sam Clegg, 2014-09-20 00:08:49]

lgtm

[bradn, 2014-09-20 00:31:23]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2014-09-20 00:32:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/587933003/1

[commit-bot: I haz the power, 2014-09-20 00:32:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/587933003/1

[commit-bot: I haz the power, 2014-09-20 02:13:43]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-20 02:13:46]

Failed to commit the patch.

[commit-bot: I haz the power, 2014-09-20 02:13:53]

Committed patchset #1 (id:1) as a1e61f929fed323ab558ab4ccc835de3bd66d523

[commit-bot: I haz the power, 2014-09-20 02:14:24]

Patchset 1 (id:??) landed as
https://crrev.com/865a65ad84ac9a6b1a89aaf3bfb0fe77fc6be3d9
Cr-Commit-Position: refs/heads/master@{#295844}