Skip over files that begin with '.' since they are often hidden temporary
files.

BUG=angle:553

Change-Id: I74f8412e6959c49bfca7f0ae063af42027e12549
Reviewed-on: https://chromium-review.googlesource.com/188035Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>