Comment 3 for bug 1760642

This was an error in the qrt test, that didn't ensure that /proc/slabinfo existed before checking its permissions (due to a different configuration of the kernel). I've fixed the script to not fail in this case in qrt commit https://git.launchpad.net/qa-regression-testing/commit/?id=b144f33031e759fec72dee2319f1daa44669b678.

Thanks.