fix nullable issue in comments field

It really only needs to allow for an empty entry. I'm also
adding some help text to the field to describe its usage, since
the name comments could be assumed to be something else.

Signed-off-by: Andy Doan <andy.doan@linaro.org>
Change-Id: Ibd6569a97121c0c00c47b77175873a24d4dc1db1
1 file changed
tree: 7bb8e3a3c70d767a3437fded1ae0c95f75fb5c54
  1. android_benchmark_views_app/
  2. .gitignore
  3. MANIFEST.in
  4. setup.cfg
  5. setup.py