This CL changes all ArraySort benchmarks to execute the setup
function for each iteration (one run call), instead of only once for
all iterations.

Even though we now also measure the time needed to copy and prepare
the array, this is needed, otherwise we would mainly measure sorting
already sorted arrays.

R=cbruni@chromium.org, jgruber@chromium.org

Change-Id: I2e0e301b52b0288b8c825c3c8401c348c4a0dee7
Reviewed-on: https://chromium-review.googlesource.com/1105045Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Simon Zünd <szuend@google.com>
Cr-Commit-Position: refs/heads/master@{#53825}