Log Message:
adwaita-icon-theme: update to 3.28.0.

3.28.0
3.27.90
  - camera-switch-symbolic (bug #750285)
  - highres sizing issue (bug #785574)
  - vpn-noroute
  - optional zopfli png optimizer
  - audio-volume-* fuzzy (bug #709131)
  - audio-volume-overamplified
  - new metaphors for settings -- notifications, volume and privacy