Add file_size to make debugging large files easier.

Make it easier to notice large core and messages files
that are consuming GB of space under sysinfo folders.

BUG=chromium-os:36326
TEST=http://cargocult.mtv:8080/logs/run_remote_tests.Qt5p/
TEST=many files under: http://cargocult.mtv:8080/

Change-Id: I5adc2b56b92be4143f2a9ba96922af28e5f99274
Reviewed-on: https://gerrit.chromium.org/gerrit/38918
Reviewed-by: Yusuf Mohsinally <mohsinally@google.com>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
Commit-Ready: Mike Truty <truty@chromium.org>
Tested-by: Mike Truty <truty@chromium.org>
2 files changed