add eye and cloud-lock icons to icon font & newfiles

This adds icons to our icon font for the new files area.

Test Plan:
- Load up /styleguide
- You should see 2 new icons ear the end of teh
  "Icons" section our new icons

Screenshot: http://cl.ly/image/031a0w2L0h3C

when you select some things in newfiles, the
preview button should be an eye not a magnifying
glass. like http://cl.ly/image/0Y1p1h0Q1R3R

when something is restricted access it should have
a lock in the cloud

Change-Id: I7353b76d3331d8aeaf254fa84cdcb746cd3e8a1a
Reviewed-on: https://gerrit.instructure.com/41800
Reviewed-by: Ryan Shaw <ryan@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>
Tested-by: Ryan Shaw <ryan@instructure.com>