By removing fs::directory_options::skip_permission_denied which isn't
available on VxWorks.
It's not strictly needed for the benchmark. I had added it to test
locally by listing some dirs under '/' (not all of them are readable for
users), and saw no reason at the time to remove it. The benchmark itself
listing dirs in the qtbase source dir tree.
Pick-to: 6.7
Task-number: QTBUG-115777
Change-Id: I4e68d01abd707dbf553f0a5832739ef0f4c9d585
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2a7c71bef0