Fix stragling Ubuntu dimensions

BUG=skia:

Change-Id: I2328190da7fc1f2db10bb87684fb3a3e95751ec5
Reviewed-on: https://skia-review.googlesource.com/6111
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
tree: de1375301c16f1c856ad645fedf1f74e4b266e42
  1. recipe_modules/
  2. recipes.py
  3. recipes/