mod_image_for_recovery.sh: Fix unencrypted directory permissions.

/stateful/unencrypted was being created with the file permissions 766, when
it should have been created with 755.

BUG=chromium:432774
TEST=Built a recovery image.

Change-Id: I12766174b0e59c4d864269ca20ba7636be113b51
Reviewed-on: https://chromium-review.googlesource.com/229982
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Don Garrett <dgarrett@chromium.org>
Tested-by: Don Garrett <dgarrett@chromium.org>
diff --git a/mod_image_for_recovery.sh b/mod_image_for_recovery.sh
index 0a21e7b..5529b32 100755
--- a/mod_image_for_recovery.sh
+++ b/mod_image_for_recovery.sh
@@ -296,7 +296,7 @@
 
   # Create the directories that are going to be needed below. With correct
   # permissions.
-  mkdir --mode=766 "${new_stateful_mnt}/unencrypted"
+  mkdir --mode=755 "${new_stateful_mnt}/unencrypted"
 
   # Copy over any files that need to be preserved.
   for name in ${WHITELIST}; do