Rsync was failling with permission denied (13) when trying to
send_file for some tests. The belief is that it's happening
because the file that was trying to be sent is lacking read
permissions for all.

Bug: 1126533
Change-Id: Iaf02d8bb71c8a571230cab6fc5f873d8227d7f8d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2431781
Commit-Queue: Michael Chang <donchan@microsoft.com>
Reviewed-by: Joshua Pawlicki <waffles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810832}