Skip the $evaluatedFiles cache for Benchmarker.php

If going through the cache, Benchmarker.php doesn't load Maintenance.php
and the RUN_MAINTENANCE_IF_MAIN isn't translated properly.

 So eg. php find-entries.php maintenance/benchmarks/bench_HTTP_HTTPS.php
maintenance/benchmarks/bench_if_switch.php
only passed the first file.

Change-Id: I33207a494c2d3cb6a2a68751906cf9799c4705f0