Cast byte* to void* before printing so that it's not interpreted as a
null-terminated string.

Change-Id: I32b5a51913c3382b43d7b231d6b8fd4c17e32bb6
Reviewed-on: https://chromium-review.googlesource.com/c/1275352Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56553}